Backport "Scala 2.13.10 (was 2.13.8)" (#16203)

Backports #16074

Author: Kordyjan

community-build/community-projects/play-json

@@ -120,8 +120,8 @@ object Build {
    *  scala-library.
    */
   def stdlibVersion(implicit mode: Mode): String = mode match {
-    case NonBootstrapped => "2.13.8"
-    case Bootstrapped => "2.13.8"
+    case NonBootstrapped => "2.13.10"
+    case Bootstrapped => "2.13.10"
   }
 
   val dottyOrganization = "org.scala-lang"

community-build/community-projects/stdLib213

@@ -33,7 +33,7 @@ class Scaladoc2ExternalLocationProviderIntegrationTest extends ExternalLocationP
     "https://www.scala-lang.org/api/current/scala/util/matching/Regex$$Match.html",
     "https://www.scala-lang.org/api/current/scala/Predef$.html#String",
     "https://www.scala-lang.org/api/current/scala/collection/immutable/Map.html",
-    "https://www.scala-lang.org/api/current/scala/collection/IterableOnceOps.html#addString(b:StringBuilder,start:String,sep:String,end:String):StringBuilder",
+    "https://www.scala-lang.org/api/current/scala/collection/IterableOnceOps.html#addString(b:StringBuilder,start:String,sep:String,end:String):b.type",
     "https://www.scala-lang.org/api/current/scala/collection/IterableOnceOps.html#mkString(start:String,sep:String,end:String):String",
     "https://external.stubs/api/tests/externalStubs/$div$bslash$.html",
     "https://external.stubs/api/tests/externalStubs/$bslash$div$.html"
@@ -67,7 +67,7 @@ class Scaladoc2LegacyExternalLocationProviderIntegrationTest extends LegacyExter
     "https://www.scala-lang.org/api/current/scala/util/matching/Regex$$Match.html",
     "https://www.scala-lang.org/api/current/scala/Predef$.html#String",
     "https://www.scala-lang.org/api/current/scala/collection/immutable/Map.html",
-    "https://www.scala-lang.org/api/current/scala/collection/IterableOnceOps.html#addString(b:StringBuilder,start:String,sep:String,end:String):StringBuilder",
+    "https://www.scala-lang.org/api/current/scala/collection/IterableOnceOps.html#addString(b:StringBuilder,start:String,sep:String,end:String):b.type",
     "https://www.scala-lang.org/api/current/scala/collection/IterableOnceOps.html#mkString(start:String,sep:String,end:String):String"
   )
 )

project/Build.scala

@@ -1,4 +1,4 @@
 -- Error: tests/neg/i11982.scala:22:38 ---------------------------------------------------------------------------------
 22 |  val p1: ("msg", 42) = unpair[Tshape]  // error: no singleton value for Any
    |                                      ^
-   |                                      No singleton value available for Any.
+   |No singleton value available for Any; eligible singleton types for `ValueOf` synthesis include literals and stable paths.