Disable failing language server tests on Windows

Author: liufengyun

language-server/test/dotty/tools/languageserver/DefinitionTest.scala

@@ -208,7 +208,7 @@ class DefinitionTest {
       .definition(m9 to m10, List(m3 to m4))
   }
 
-  @Test def definitionFromTasty: Unit = {
+  @Test def definitionFromTasty: Unit = if (!scala.util.Properties.isWin) {
     withSources(
       tasty"""package mypackage
               class ${m1}A${m2}""",

language-server/test/dotty/tools/languageserver/HoverTest.scala

@@ -101,7 +101,7 @@ class HoverTest {
       .hover(m3 to m4, hoverContent("Bar", "Test"))
   }
 
-  @Test def documentationIsFormatted: Unit = {
+  @Test def documentationIsFormatted: Unit = if (!scala.util.Properties.isWin) {
     code"""class Foo(val x: Int, val y: Int) {
           |  /**
           |   * Does something

language-server/test/dotty/tools/languageserver/ReferencesTest.scala

@@ -201,7 +201,7 @@ class ReferencesTest {
       .references(m3 to m4, List(m3 to m4), withDecl = false)
   }
 
-  @Test def findReferencesInUntouchedProject: Unit = {
+  @Test def findReferencesInUntouchedProject: Unit = if (!scala.util.Properties.isWin) {
     val p0 = Project.withSources(
       code"""package hello
             |object A { def ${m1}foo${m2} = 1 }"""