From 562ea8329881112f24aa5ec69953f49b237773dc Mon Sep 17 00:00:00 2001
From: Lukas Rytz <lukas.rytz@gmail.com>
Date: Thu, 22 Mar 2018 21:58:40 +0100
Subject: [PATCH 1/4] Seq => collection.Seq

Preserve for binary compatability.
Scala 2.13 collections rewrite defaults to immutable.Seq.
---
 jvm/src/test/scala/scala/xml/ReuseNodesTest.scala               | 1 +
 jvm/src/test/scala/scala/xml/SerializationTest.scala            | 1 +
 jvm/src/test/scala/scala/xml/XMLTest.scala                      | 1 +
 shared/src/main/scala/scala/xml/Atom.scala                      | 2 ++
 shared/src/main/scala/scala/xml/Attribute.scala                 | 2 ++
 shared/src/main/scala/scala/xml/Document.scala                  | 2 ++
 shared/src/main/scala/scala/xml/Elem.scala                      | 2 ++
 shared/src/main/scala/scala/xml/Equality.scala                  | 2 ++
 shared/src/main/scala/scala/xml/Group.scala                     | 2 ++
 shared/src/main/scala/scala/xml/MetaData.scala                  | 1 +
 shared/src/main/scala/scala/xml/NamespaceBinding.scala          | 1 +
 shared/src/main/scala/scala/xml/Node.scala                      | 2 ++
 shared/src/main/scala/scala/xml/NodeSeq.scala                   | 1 +
 shared/src/main/scala/scala/xml/Null.scala                      | 1 +
 shared/src/main/scala/scala/xml/PrefixedAttribute.scala         | 2 ++
 shared/src/main/scala/scala/xml/PrettyPrinter.scala             | 1 +
 shared/src/main/scala/scala/xml/TextBuffer.scala                | 1 +
 shared/src/main/scala/scala/xml/UnprefixedAttribute.scala       | 2 ++
 shared/src/main/scala/scala/xml/Utility.scala                   | 1 +
 shared/src/main/scala/scala/xml/Xhtml.scala                     | 1 +
 shared/src/main/scala/scala/xml/dtd/ContentModel.scala          | 1 +
 shared/src/main/scala/scala/xml/dtd/DTD.scala                   | 1 +
 shared/src/main/scala/scala/xml/dtd/DocType.scala               | 2 ++
 shared/src/main/scala/scala/xml/dtd/ElementValidator.scala      | 1 +
 shared/src/main/scala/scala/xml/dtd/Scanner.scala               | 2 ++
 shared/src/main/scala/scala/xml/dtd/impl/BaseBerrySethi.scala   | 1 +
 shared/src/main/scala/scala/xml/dtd/impl/Inclusion.scala        | 2 ++
 shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala  | 1 +
 shared/src/main/scala/scala/xml/dtd/impl/WordBerrySethi.scala   | 1 +
 shared/src/main/scala/scala/xml/factory/LoggedNodeFactory.scala | 2 ++
 shared/src/main/scala/scala/xml/factory/NodeFactory.scala       | 2 ++
 shared/src/main/scala/scala/xml/parsing/FactoryAdapter.scala    | 1 +
 .../src/main/scala/scala/xml/parsing/MarkupParserCommon.scala   | 1 +
 .../main/scala/scala/xml/parsing/NoBindingFactoryAdapter.scala  | 1 +
 shared/src/main/scala/scala/xml/parsing/TokenTests.scala        | 2 ++
 .../src/main/scala/scala/xml/transform/BasicTransformer.scala   | 2 ++
 shared/src/main/scala/scala/xml/transform/RewriteRule.scala     | 2 ++
 shared/src/main/scala/scala/xml/transform/RuleTransformer.scala | 2 ++
 shared/src/test/scala/scala/xml/AttributeTest.scala             | 1 +
 shared/src/test/scala/scala/xml/PatternMatching.scala           | 1 +
 shared/src/test/scala/scala/xml/Transformers.scala              | 1 +
 shared/src/test/scala/scala/xml/UtilityTest.scala               | 1 +
 shared/src/test/scala/scala/xml/XMLSyntaxTest.scala             | 1 +
 shared/src/test/scala/scala/xml/XMLTest.scala                   | 1 +
 44 files changed, 62 insertions(+)

diff --git a/jvm/src/test/scala/scala/xml/ReuseNodesTest.scala b/jvm/src/test/scala/scala/xml/ReuseNodesTest.scala
index 586fb92a0..f419a1de4 100644
--- a/jvm/src/test/scala/scala/xml/ReuseNodesTest.scala
+++ b/jvm/src/test/scala/scala/xml/ReuseNodesTest.scala
@@ -1,6 +1,7 @@
 package scala.xml
 
 import scala.xml.transform._
+import scala.collection.Seq
 import org.junit.Assert.assertSame
 import org.junit.experimental.theories.Theories
 import org.junit.experimental.theories.Theory
diff --git a/jvm/src/test/scala/scala/xml/SerializationTest.scala b/jvm/src/test/scala/scala/xml/SerializationTest.scala
index d3f4eb754..37da4c296 100644
--- a/jvm/src/test/scala/scala/xml/SerializationTest.scala
+++ b/jvm/src/test/scala/scala/xml/SerializationTest.scala
@@ -1,5 +1,6 @@
 package scala.xml
 
+import scala.collection.Seq
 import org.junit.Assert.assertEquals
 import org.junit.Test
 
diff --git a/jvm/src/test/scala/scala/xml/XMLTest.scala b/jvm/src/test/scala/scala/xml/XMLTest.scala
index dfd06aef1..64813c732 100644
--- a/jvm/src/test/scala/scala/xml/XMLTest.scala
+++ b/jvm/src/test/scala/scala/xml/XMLTest.scala
@@ -11,6 +11,7 @@ import java.io.StringWriter
 import java.io.ByteArrayOutputStream
 import java.io.StringReader
 import scala.collection.Iterable
+import scala.collection.Seq
 import scala.xml.Utility.sort
 
 object XMLTestJVM {
diff --git a/shared/src/main/scala/scala/xml/Atom.scala b/shared/src/main/scala/scala/xml/Atom.scala
index b8ee13397..311157147 100644
--- a/shared/src/main/scala/scala/xml/Atom.scala
+++ b/shared/src/main/scala/scala/xml/Atom.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * The class `Atom` provides an XML node for text (`PCDATA`).
  *  It is used in both non-bound and bound XML representations.
diff --git a/shared/src/main/scala/scala/xml/Attribute.scala b/shared/src/main/scala/scala/xml/Attribute.scala
index d8ca107fb..4423ad9ab 100644
--- a/shared/src/main/scala/scala/xml/Attribute.scala
+++ b/shared/src/main/scala/scala/xml/Attribute.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * This singleton object contains the `apply` and `unapply` methods for
  *  convenient construction and deconstruction.
diff --git a/shared/src/main/scala/scala/xml/Document.scala b/shared/src/main/scala/scala/xml/Document.scala
index 672f0284d..6213e0e40 100644
--- a/shared/src/main/scala/scala/xml/Document.scala
+++ b/shared/src/main/scala/scala/xml/Document.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * A document information item (according to InfoSet spec). The comments
  *  are copied from the Infoset spec, only augmented with some information
diff --git a/shared/src/main/scala/scala/xml/Elem.scala b/shared/src/main/scala/scala/xml/Elem.scala
index 4c308017e..8392255ca 100755
--- a/shared/src/main/scala/scala/xml/Elem.scala
+++ b/shared/src/main/scala/scala/xml/Elem.scala
@@ -11,6 +11,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * This singleton object contains the `apply` and `unapplySeq` methods for
  *  convenient construction and deconstruction. It is possible to deconstruct
diff --git a/shared/src/main/scala/scala/xml/Equality.scala b/shared/src/main/scala/scala/xml/Equality.scala
index 44d6a8d4b..9f22fc2fb 100644
--- a/shared/src/main/scala/scala/xml/Equality.scala
+++ b/shared/src/main/scala/scala/xml/Equality.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * In an attempt to contain the damage being inflicted on consistency by the
  *  ad hoc `equals` methods spread around `xml`, the logic is centralized and
diff --git a/shared/src/main/scala/scala/xml/Group.scala b/shared/src/main/scala/scala/xml/Group.scala
index a539530d8..dc4c19960 100644
--- a/shared/src/main/scala/scala/xml/Group.scala
+++ b/shared/src/main/scala/scala/xml/Group.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * A hack to group XML nodes in one node for output.
  *
diff --git a/shared/src/main/scala/scala/xml/MetaData.scala b/shared/src/main/scala/scala/xml/MetaData.scala
index 48e7173d9..1affff4e0 100644
--- a/shared/src/main/scala/scala/xml/MetaData.scala
+++ b/shared/src/main/scala/scala/xml/MetaData.scala
@@ -14,6 +14,7 @@ package xml
 import Utility.sbToString
 import scala.annotation.tailrec
 import scala.collection.AbstractIterable
+import scala.collection.Seq
 
 object MetaData {
   /**
diff --git a/shared/src/main/scala/scala/xml/NamespaceBinding.scala b/shared/src/main/scala/scala/xml/NamespaceBinding.scala
index 7bc2ca43d..e8ad08f77 100644
--- a/shared/src/main/scala/scala/xml/NamespaceBinding.scala
+++ b/shared/src/main/scala/scala/xml/NamespaceBinding.scala
@@ -9,6 +9,7 @@
 package scala
 package xml
 
+import scala.collection.Seq
 import Utility.sbToString
 
 /**
diff --git a/shared/src/main/scala/scala/xml/Node.scala b/shared/src/main/scala/scala/xml/Node.scala
index 57ed966e3..f62edabda 100755
--- a/shared/src/main/scala/scala/xml/Node.scala
+++ b/shared/src/main/scala/scala/xml/Node.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * This singleton object contains the `unapplySeq` method for
  *  convenient deconstruction.
diff --git a/shared/src/main/scala/scala/xml/NodeSeq.scala b/shared/src/main/scala/scala/xml/NodeSeq.scala
index bc88aca19..f93c6249e 100644
--- a/shared/src/main/scala/scala/xml/NodeSeq.scala
+++ b/shared/src/main/scala/scala/xml/NodeSeq.scala
@@ -13,6 +13,7 @@ import scala.collection.{ mutable, immutable, generic, SeqLike, AbstractSeq }
 import mutable.{ Builder, ListBuffer }
 import generic.{ CanBuildFrom }
 import scala.language.implicitConversions
+import scala.collection.Seq
 
 /**
  * This object ...
diff --git a/shared/src/main/scala/scala/xml/Null.scala b/shared/src/main/scala/scala/xml/Null.scala
index 9d6a5c9af..6e438a53b 100644
--- a/shared/src/main/scala/scala/xml/Null.scala
+++ b/shared/src/main/scala/scala/xml/Null.scala
@@ -11,6 +11,7 @@ package xml
 
 import Utility.isNameStart
 import scala.collection.Iterator
+import scala.collection.Seq
 
 /**
  * Essentially, every method in here is a dummy, returning Zero[T].
diff --git a/shared/src/main/scala/scala/xml/PrefixedAttribute.scala b/shared/src/main/scala/scala/xml/PrefixedAttribute.scala
index f269ba748..b1408d287 100644
--- a/shared/src/main/scala/scala/xml/PrefixedAttribute.scala
+++ b/shared/src/main/scala/scala/xml/PrefixedAttribute.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * prefixed attributes always have a non-null namespace.
  *
diff --git a/shared/src/main/scala/scala/xml/PrettyPrinter.scala b/shared/src/main/scala/scala/xml/PrettyPrinter.scala
index 6cb3f6cdb..b5f41d157 100755
--- a/shared/src/main/scala/scala/xml/PrettyPrinter.scala
+++ b/shared/src/main/scala/scala/xml/PrettyPrinter.scala
@@ -9,6 +9,7 @@
 package scala
 package xml
 
+import scala.collection.Seq
 import Utility.sbToString
 
 /**
diff --git a/shared/src/main/scala/scala/xml/TextBuffer.scala b/shared/src/main/scala/scala/xml/TextBuffer.scala
index 0206b2e3e..8ab2a53e4 100644
--- a/shared/src/main/scala/scala/xml/TextBuffer.scala
+++ b/shared/src/main/scala/scala/xml/TextBuffer.scala
@@ -9,6 +9,7 @@
 package scala
 package xml
 
+import scala.collection.Seq
 import Utility.isSpace
 
 object TextBuffer {
diff --git a/shared/src/main/scala/scala/xml/UnprefixedAttribute.scala b/shared/src/main/scala/scala/xml/UnprefixedAttribute.scala
index db89b8913..d7ead87dc 100644
--- a/shared/src/main/scala/scala/xml/UnprefixedAttribute.scala
+++ b/shared/src/main/scala/scala/xml/UnprefixedAttribute.scala
@@ -9,6 +9,8 @@
 package scala
 package xml
 
+import scala.collection.Seq
+
 /**
  * Unprefixed attributes have the null namespace, and no prefix field
  *
diff --git a/shared/src/main/scala/scala/xml/Utility.scala b/shared/src/main/scala/scala/xml/Utility.scala
index ce14fbc85..b40adf2d8 100755
--- a/shared/src/main/scala/scala/xml/Utility.scala
+++ b/shared/src/main/scala/scala/xml/Utility.scala
@@ -11,6 +11,7 @@ package xml
 
 import scala.collection.mutable
 import scala.language.implicitConversions
+import scala.collection.Seq
 
 /**
  * The `Utility` object provides utility functions for processing instances
diff --git a/shared/src/main/scala/scala/xml/Xhtml.scala b/shared/src/main/scala/scala/xml/Xhtml.scala
index ad5fbeda0..5d89101e0 100644
--- a/shared/src/main/scala/scala/xml/Xhtml.scala
+++ b/shared/src/main/scala/scala/xml/Xhtml.scala
@@ -4,6 +4,7 @@ package xml
 
 import parsing.XhtmlEntities
 import Utility.{ sbToString, isAtomAndNotText }
+import scala.collection.Seq
 
 /* (c) David Pollak  2007 WorldWide Conferencing, LLC */
 
diff --git a/shared/src/main/scala/scala/xml/dtd/ContentModel.scala b/shared/src/main/scala/scala/xml/dtd/ContentModel.scala
index 32d07c6c1..a36674d61 100644
--- a/shared/src/main/scala/scala/xml/dtd/ContentModel.scala
+++ b/shared/src/main/scala/scala/xml/dtd/ContentModel.scala
@@ -10,6 +10,7 @@ package scala
 package xml
 package dtd
 
+import scala.collection.Seq
 import scala.xml.dtd.impl._
 import scala.xml.Utility.sbToString
 import PartialFunction._
diff --git a/shared/src/main/scala/scala/xml/dtd/DTD.scala b/shared/src/main/scala/scala/xml/dtd/DTD.scala
index 51ab31226..f01fe5a0a 100644
--- a/shared/src/main/scala/scala/xml/dtd/DTD.scala
+++ b/shared/src/main/scala/scala/xml/dtd/DTD.scala
@@ -11,6 +11,7 @@ package xml
 package dtd
 
 import scala.collection.mutable
+import scala.collection.Seq
 
 /**
  * A document type declaration.
diff --git a/shared/src/main/scala/scala/xml/dtd/DocType.scala b/shared/src/main/scala/scala/xml/dtd/DocType.scala
index f78403440..4bc78b1a2 100644
--- a/shared/src/main/scala/scala/xml/dtd/DocType.scala
+++ b/shared/src/main/scala/scala/xml/dtd/DocType.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package dtd
 
+import scala.collection.Seq
+
 /**
  * An XML node for document type declaration.
  *
diff --git a/shared/src/main/scala/scala/xml/dtd/ElementValidator.scala b/shared/src/main/scala/scala/xml/dtd/ElementValidator.scala
index 4d5ff979d..c30c2af17 100644
--- a/shared/src/main/scala/scala/xml/dtd/ElementValidator.scala
+++ b/shared/src/main/scala/scala/xml/dtd/ElementValidator.scala
@@ -12,6 +12,7 @@ package dtd
 
 import PartialFunction._
 import scala.collection.mutable
+import scala.collection.Seq
 
 import ContentModel.ElemName
 import MakeValidationException._ // @todo other exceptions
diff --git a/shared/src/main/scala/scala/xml/dtd/Scanner.scala b/shared/src/main/scala/scala/xml/dtd/Scanner.scala
index 24160cddc..425f3cd7f 100644
--- a/shared/src/main/scala/scala/xml/dtd/Scanner.scala
+++ b/shared/src/main/scala/scala/xml/dtd/Scanner.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package dtd
 
+import scala.collection.Seq
+
 /**
  * Scanner for regexps (content models in DTD element declarations)
  *  todo: cleanup
diff --git a/shared/src/main/scala/scala/xml/dtd/impl/BaseBerrySethi.scala b/shared/src/main/scala/scala/xml/dtd/impl/BaseBerrySethi.scala
index e7c68e2ed..869ed9ae4 100644
--- a/shared/src/main/scala/scala/xml/dtd/impl/BaseBerrySethi.scala
+++ b/shared/src/main/scala/scala/xml/dtd/impl/BaseBerrySethi.scala
@@ -10,6 +10,7 @@ package scala
 package xml.dtd.impl
 
 import scala.collection.{ mutable, immutable }
+import scala.collection.Seq
 
 // todo: replace global variable pos with acc
 
diff --git a/shared/src/main/scala/scala/xml/dtd/impl/Inclusion.scala b/shared/src/main/scala/scala/xml/dtd/impl/Inclusion.scala
index 0f1e201b0..709c2c530 100644
--- a/shared/src/main/scala/scala/xml/dtd/impl/Inclusion.scala
+++ b/shared/src/main/scala/scala/xml/dtd/impl/Inclusion.scala
@@ -9,6 +9,8 @@
 package scala
 package xml.dtd.impl
 
+import scala.collection.Seq
+
 /**
  * A fast test of language inclusion between minimal automata.
  *  inspired by the ''AMoRE automata library''.
diff --git a/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala b/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala
index 07beed479..09f1b1d3f 100644
--- a/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala
+++ b/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala
@@ -10,6 +10,7 @@ package scala
 package xml.dtd.impl
 
 import scala.collection.{ immutable, mutable }
+import scala.collection.Seq
 
 /**
  * A nondeterministic automaton. States are integers, where
diff --git a/shared/src/main/scala/scala/xml/dtd/impl/WordBerrySethi.scala b/shared/src/main/scala/scala/xml/dtd/impl/WordBerrySethi.scala
index e96cd1299..3f0ef361f 100644
--- a/shared/src/main/scala/scala/xml/dtd/impl/WordBerrySethi.scala
+++ b/shared/src/main/scala/scala/xml/dtd/impl/WordBerrySethi.scala
@@ -10,6 +10,7 @@ package scala
 package xml.dtd.impl
 
 import scala.collection.{ immutable, mutable }
+import scala.collection.Seq
 
 /**
  * This class turns a regular expression into a [[scala.util.automata.NondetWordAutom]]
diff --git a/shared/src/main/scala/scala/xml/factory/LoggedNodeFactory.scala b/shared/src/main/scala/scala/xml/factory/LoggedNodeFactory.scala
index e8189eb7f..10bf57f56 100644
--- a/shared/src/main/scala/scala/xml/factory/LoggedNodeFactory.scala
+++ b/shared/src/main/scala/scala/xml/factory/LoggedNodeFactory.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package factory
 
+import scala.collection.Seq
+
 /**
  * This class logs what the nodefactory is actually doing.
  *  If you want to see what happens during loading, use it like this:
diff --git a/shared/src/main/scala/scala/xml/factory/NodeFactory.scala b/shared/src/main/scala/scala/xml/factory/NodeFactory.scala
index 283fd8fd5..2ca162952 100644
--- a/shared/src/main/scala/scala/xml/factory/NodeFactory.scala
+++ b/shared/src/main/scala/scala/xml/factory/NodeFactory.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package factory
 
+import scala.collection.Seq
+
 trait NodeFactory[A <: Node] {
   val ignoreComments = false
   val ignoreProcInstr = false
diff --git a/shared/src/main/scala/scala/xml/parsing/FactoryAdapter.scala b/shared/src/main/scala/scala/xml/parsing/FactoryAdapter.scala
index 607a0aace..d181621dd 100644
--- a/shared/src/main/scala/scala/xml/parsing/FactoryAdapter.scala
+++ b/shared/src/main/scala/scala/xml/parsing/FactoryAdapter.scala
@@ -11,6 +11,7 @@ package xml
 package parsing
 
 import scala.collection.{ mutable, Iterator }
+import scala.collection.Seq
 import org.xml.sax.Attributes
 import org.xml.sax.helpers.DefaultHandler
 
diff --git a/shared/src/main/scala/scala/xml/parsing/MarkupParserCommon.scala b/shared/src/main/scala/scala/xml/parsing/MarkupParserCommon.scala
index 2685f0632..a6b2ec187 100644
--- a/shared/src/main/scala/scala/xml/parsing/MarkupParserCommon.scala
+++ b/shared/src/main/scala/scala/xml/parsing/MarkupParserCommon.scala
@@ -10,6 +10,7 @@ package scala
 package xml
 package parsing
 
+import scala.collection.Seq
 import Utility.SU
 
 /**
diff --git a/shared/src/main/scala/scala/xml/parsing/NoBindingFactoryAdapter.scala b/shared/src/main/scala/scala/xml/parsing/NoBindingFactoryAdapter.scala
index 92675897d..8b0711aa0 100644
--- a/shared/src/main/scala/scala/xml/parsing/NoBindingFactoryAdapter.scala
+++ b/shared/src/main/scala/scala/xml/parsing/NoBindingFactoryAdapter.scala
@@ -10,6 +10,7 @@ package scala
 package xml
 package parsing
 
+import scala.collection.Seq
 import factory.NodeFactory
 
 /**
diff --git a/shared/src/main/scala/scala/xml/parsing/TokenTests.scala b/shared/src/main/scala/scala/xml/parsing/TokenTests.scala
index 5e277dcde..3db0ece88 100644
--- a/shared/src/main/scala/scala/xml/parsing/TokenTests.scala
+++ b/shared/src/main/scala/scala/xml/parsing/TokenTests.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package parsing
 
+import scala.collection.Seq
+
 /**
  * Helper functions for parsing XML fragments
  */
diff --git a/shared/src/main/scala/scala/xml/transform/BasicTransformer.scala b/shared/src/main/scala/scala/xml/transform/BasicTransformer.scala
index fd0d9560f..7d659d5f4 100644
--- a/shared/src/main/scala/scala/xml/transform/BasicTransformer.scala
+++ b/shared/src/main/scala/scala/xml/transform/BasicTransformer.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package transform
 
+import scala.collection.Seq
+
 /**
  * A class for XML transformations.
  *
diff --git a/shared/src/main/scala/scala/xml/transform/RewriteRule.scala b/shared/src/main/scala/scala/xml/transform/RewriteRule.scala
index c6b9df923..b9374e7e5 100644
--- a/shared/src/main/scala/scala/xml/transform/RewriteRule.scala
+++ b/shared/src/main/scala/scala/xml/transform/RewriteRule.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package transform
 
+import scala.collection.Seq
+
 /**
  * A RewriteRule, when applied to a term, yields either
  *  the result of rewriting the term or the term itself if the rule
diff --git a/shared/src/main/scala/scala/xml/transform/RuleTransformer.scala b/shared/src/main/scala/scala/xml/transform/RuleTransformer.scala
index c9a57f17d..1b71071cb 100644
--- a/shared/src/main/scala/scala/xml/transform/RuleTransformer.scala
+++ b/shared/src/main/scala/scala/xml/transform/RuleTransformer.scala
@@ -10,6 +10,8 @@ package scala
 package xml
 package transform
 
+import scala.collection.Seq
+
 class RuleTransformer(rules: RewriteRule*) extends BasicTransformer {
   override def transform(n: Node): Seq[Node] =
     rules.foldLeft(super.transform(n)) { (res, rule) => rule transform res }
diff --git a/shared/src/test/scala/scala/xml/AttributeTest.scala b/shared/src/test/scala/scala/xml/AttributeTest.scala
index 8943a0a00..0b3891496 100644
--- a/shared/src/test/scala/scala/xml/AttributeTest.scala
+++ b/shared/src/test/scala/scala/xml/AttributeTest.scala
@@ -1,5 +1,6 @@
 package scala.xml
 
+import scala.collection.Seq
 import org.junit.Test
 import org.junit.Assert.assertEquals
 
diff --git a/shared/src/test/scala/scala/xml/PatternMatching.scala b/shared/src/test/scala/scala/xml/PatternMatching.scala
index fbf94b62b..41644cec1 100644
--- a/shared/src/test/scala/scala/xml/PatternMatching.scala
+++ b/shared/src/test/scala/scala/xml/PatternMatching.scala
@@ -1,5 +1,6 @@
 package scala.xml
 
+import scala.collection.Seq
 import org.junit.Test
 import org.junit.Assert.assertTrue
 import org.junit.Assert.assertEquals
diff --git a/shared/src/test/scala/scala/xml/Transformers.scala b/shared/src/test/scala/scala/xml/Transformers.scala
index 5cec41080..146a480a3 100644
--- a/shared/src/test/scala/scala/xml/Transformers.scala
+++ b/shared/src/test/scala/scala/xml/Transformers.scala
@@ -1,5 +1,6 @@
 package scala.xml
 
+import scala.collection.Seq
 import scala.xml.transform._
 
 import org.junit.Test
diff --git a/shared/src/test/scala/scala/xml/UtilityTest.scala b/shared/src/test/scala/scala/xml/UtilityTest.scala
index b365294c9..44db70d67 100644
--- a/shared/src/test/scala/scala/xml/UtilityTest.scala
+++ b/shared/src/test/scala/scala/xml/UtilityTest.scala
@@ -1,5 +1,6 @@
 package scala.xml
 
+import scala.collection.Seq
 import org.junit.Test
 import org.junit.Assert.assertTrue
 import org.junit.Assert.assertEquals
diff --git a/shared/src/test/scala/scala/xml/XMLSyntaxTest.scala b/shared/src/test/scala/scala/xml/XMLSyntaxTest.scala
index 89b9bdbbc..913c027f0 100644
--- a/shared/src/test/scala/scala/xml/XMLSyntaxTest.scala
+++ b/shared/src/test/scala/scala/xml/XMLSyntaxTest.scala
@@ -1,5 +1,6 @@
 package scala.xml
 
+import scala.collection.Seq
 import org.junit.Test
 import org.junit.Assert.assertTrue
 import org.junit.Assert.assertFalse
diff --git a/shared/src/test/scala/scala/xml/XMLTest.scala b/shared/src/test/scala/scala/xml/XMLTest.scala
index 43366300b..6147f56b4 100644
--- a/shared/src/test/scala/scala/xml/XMLTest.scala
+++ b/shared/src/test/scala/scala/xml/XMLTest.scala
@@ -9,6 +9,7 @@ import org.junit.Assert.assertEquals
 // import scala.xml.parsing.ConstructingParser
 import java.io.StringWriter
 import scala.collection.Iterable
+import scala.collection.Seq
 import scala.xml.Utility.sort
 
 object XMLTest {

From 59dd7425752dfdc4dbc5fe56dddaa3c34e368b7a Mon Sep 17 00:00:00 2001
From: "Aaron S. Hawley" <aaron.s.hawley@gmail.com>
Date: Mon, 16 Apr 2018 00:55:28 -0400
Subject: [PATCH 2/4] Convert BitSet.toSet

Fix compiler error with Scala 2.13 collections rewrite:

ambiguous reference to overloaded definition,
both method map in trait StrictOptimizedIterableOps of type [B](f: Int => B)scala.collection.immutable.Set[B]
and  method map in trait SortedSetOps of type [B](f: Int => B)(implicit evidence$4: Ordering[B])scala.collection.immutable.SortedSet[B]
match argument types (Int => scala.collection.immutable.BitSet)
    (Q map f).foldLeft(immutable.BitSet.empty)(_ ++ _)
       ^
---
 shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala b/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala
index 09f1b1d3f..91fdf86c0 100644
--- a/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala
+++ b/shared/src/main/scala/scala/xml/dtd/impl/NondetWordAutom.scala
@@ -48,7 +48,7 @@ private[dtd] abstract class NondetWordAutom[T <: AnyRef] {
   def nextDefault(Q: immutable.BitSet): immutable.BitSet = next(Q, default)
 
   private def next(Q: immutable.BitSet, f: (Int) => immutable.BitSet): immutable.BitSet =
-    (Q map f).foldLeft(immutable.BitSet.empty)(_ ++ _)
+    Q.toSet.map(f).foldLeft(immutable.BitSet.empty)(_ ++ _)
 
   private def finalStates = 0 until nstates filter isFinal
   override def toString = {

From b1331176d45b9308f661a2a70830cda5927bfda9 Mon Sep 17 00:00:00 2001
From: "Aaron S. Hawley" <aaron.s.hawley@gmail.com>
Date: Mon, 16 Apr 2018 00:57:50 -0400
Subject: [PATCH 3/4] Use immutable.Map and val

Compiler complains after Scala 2.13 collections rewrite that

value updated is not a member of scala.collection.Map
---
 .../scala/xml/dtd/impl/SubsetConstruction.scala  | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/shared/src/main/scala/scala/xml/dtd/impl/SubsetConstruction.scala b/shared/src/main/scala/scala/xml/dtd/impl/SubsetConstruction.scala
index 6b74839fd..2dddfdcec 100644
--- a/shared/src/main/scala/scala/xml/dtd/impl/SubsetConstruction.scala
+++ b/shared/src/main/scala/scala/xml/dtd/impl/SubsetConstruction.scala
@@ -20,8 +20,8 @@ private[dtd] class SubsetConstruction[T <: AnyRef](val nfa: NondetWordAutom[T])
 
   def determinize: DetWordAutom[T] = {
     // for assigning numbers to bitsets
-    var indexMap = scala.collection.Map[immutable.BitSet, Int]()
-    var invIndexMap = scala.collection.Map[Int, immutable.BitSet]()
+    val indexMap = mutable.Map[immutable.BitSet, Int]()
+    val invIndexMap = mutable.Map[Int, immutable.BitSet]()
     var ix = 0
 
     // we compute the dfa with states = bitsets
@@ -30,15 +30,15 @@ private[dtd] class SubsetConstruction[T <: AnyRef](val nfa: NondetWordAutom[T])
 
     var states = Set(q0, sink) // initial set of sets
     val delta = new mutable.HashMap[immutable.BitSet, mutable.HashMap[T, immutable.BitSet]]
-    var deftrans = mutable.Map(q0 -> sink, sink -> sink) // initial transitions
-    var finals: mutable.Map[immutable.BitSet, Int] = mutable.Map()
+    val deftrans = mutable.Map(q0 -> sink, sink -> sink) // initial transitions
+    val finals: mutable.Map[immutable.BitSet, Int] = mutable.Map()
     val rest = new mutable.Stack[immutable.BitSet]
 
     rest.push(sink, q0)
 
     def addFinal(q: immutable.BitSet): Unit = {
       if (nfa containsFinal q)
-        finals = finals.updated(q, selectTag(q, nfa.finals))
+        finals(q) = selectTag(q, nfa.finals)
     }
     def add(Q: immutable.BitSet): Unit = {
       if (!states(Q)) {
@@ -53,8 +53,8 @@ private[dtd] class SubsetConstruction[T <: AnyRef](val nfa: NondetWordAutom[T])
     while (!rest.isEmpty) {
       val P = rest.pop()
       // assign a number to this bitset
-      indexMap = indexMap.updated(P, ix)
-      invIndexMap = invIndexMap.updated(ix, P)
+      indexMap(P) = ix
+      invIndexMap(ix) = P
       ix += 1
 
       // make transition map
@@ -69,7 +69,7 @@ private[dtd] class SubsetConstruction[T <: AnyRef](val nfa: NondetWordAutom[T])
 
       // collect default transitions
       val Pdef = nfa nextDefault P
-      deftrans = deftrans.updated(P, Pdef)
+      deftrans(P) = Pdef
       add(Pdef)
     }
 

From 4d1d67ad093a573797f1f832cd64252052a6d1f7 Mon Sep 17 00:00:00 2001
From: "Aaron S. Hawley" <aaron.s.hawley@gmail.com>
Date: Mon, 16 Apr 2018 01:13:35 -0400
Subject: [PATCH 4/4] Use StringBuilder.setLength

Compiler complains with new Scala 2.13 collection

reassignment to val
    cbuf.length = 0
                ^
---
 .../scala/scala/xml/parsing/MarkupParser.scala   | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/shared/src/main/scala/scala/xml/parsing/MarkupParser.scala b/shared/src/main/scala/scala/xml/parsing/MarkupParser.scala
index 0bea3784e..81d5b82cc 100755
--- a/shared/src/main/scala/scala/xml/parsing/MarkupParser.scala
+++ b/shared/src/main/scala/scala/xml/parsing/MarkupParser.scala
@@ -358,7 +358,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
     }
     nextch()
     val str = cbuf.toString()
-    cbuf.length = 0
+    cbuf.setLength(0)
     str
   }
 
@@ -390,7 +390,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
     xToken("--")
     while (!eof) {
       if (ch == '-' && { sb.append(ch); nextch(); ch == '-' }) {
-        sb.length = sb.length - 1
+        sb.setLength(sb.length - 1)
         nextch()
         xToken('>')
         return handle.comment(pos, sb.toString())
@@ -608,7 +608,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
       exit = eof || (ch == '<') || (ch == '&')
     }
     val str = cbuf.toString
-    cbuf.length = 0
+    cbuf.setLength(0)
     str
   }
 
@@ -630,7 +630,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
     }
     nextch()
     val str = cbuf.toString()
-    cbuf.length = 0
+    cbuf.setLength(0)
     str
   }
 
@@ -653,7 +653,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
     }
     nextch()
     val str = cbuf.toString
-    cbuf.length = 0
+    cbuf.setLength(0)
     str
   }
 
@@ -799,7 +799,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
     //Console.println("END["+ch+"]")
     nextch()
     val cmstr = cbuf.toString()
-    cbuf.length = 0
+    cbuf.setLength(0)
     handle.elemDecl(n, cmstr)
   }
 
@@ -826,7 +826,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
         nextch()
       }
       val atpe = cbuf.toString
-      cbuf.length = 0
+      cbuf.setLength(0)
 
       val defdecl: DefaultDecl = ch match {
         case '\'' | '"' =>
@@ -846,7 +846,7 @@ trait MarkupParser extends MarkupParserCommon with TokenTests {
       xSpaceOpt()
 
       attList ::= AttrDecl(aname, atpe, defdecl)
-      cbuf.length = 0
+      cbuf.setLength(0)
     }
     nextch()
     handle.attListDecl(n, attList.reverse)