better to confine -Xxml:coalescing to in Test

Author: SethTisue

build.sbt

@@ -11,7 +11,9 @@ scalaVersion               := crossScalaVersions.value.head
 crossScalaVersions         := Seq("2.11.7", "2.12.0-M2")
 
 //scalacOptions             ++= "-deprecation:false -feature -Xlint:-stars-align,-nullary-unit,_ -Xfatal-warnings -Xxml:coalescing".split("\\s+").to[Seq]
-scalacOptions             ++= "-deprecation:false -feature -Xlint:-stars-align,-nullary-unit,_ -Xxml:coalescing".split("\\s+").to[Seq]
+scalacOptions             ++= "-deprecation:false -feature -Xlint:-stars-align,-nullary-unit,_".split("\\s+").to[Seq]
+
+scalacOptions in Test      += "-Xxml:coalescing"
 
 // important!! must come here (why?)
 scalaModuleOsgiSettings