Address minor pull request feedback points

1. Use (x1, x2): (T1, T2) instead of (x1: T1, x2: T2)

2. More detailed error message for improper function argument

3. Fix typo

4. Completely remove LiftableClass symbol from definitions

Author: densh

src/compiler/scala/tools/reflect/quasiquotes/Holes.scala

@@ -73,7 +73,7 @@ trait Holes { self: Quasiquotes =>
   }
 
   class ApplyHole(card: Cardinality, splicee: Tree) extends Hole {
-    val (strippedTpe: Type, tpe: Type) = {
+    val (strippedTpe, tpe): (Type, Type) = {
       if (stripIterable(splicee.tpe)._1.value < card.value) cantSplice()
       val (_, strippedTpe) = stripIterable(splicee.tpe, limit = Some(card))
       if (isBottomType(strippedTpe)) cantSplice()

src/reflect/scala/reflect/internal/BuildUtils.scala

@@ -212,7 +212,7 @@ trait BuildUtils { self: SymbolTable =>
               case Nil :: (tail @ ((head :: _) :: _)) if head.mods.isImplicit => tail
               case other => other
             }
-            // undo flag modifications by mergeing flag info from constructor args and fieldDefs
+            // undo flag modifications by merging flag info from constructor args and fieldDefs
             val modsMap = fieldDefs.map { case ValDef(mods, name, _, _) => name -> mods }.toMap
             def ctorArgsCorrespondToFields = vparamssRestoredImplicits.flatten.forall { vd => modsMap.contains(vd.name) }
             if (!ctorArgsCorrespondToFields) None
@@ -394,7 +394,7 @@ trait BuildUtils { self: SymbolTable =>
     object SyntacticFunction extends SyntacticFunctionExtractor {
       def apply(params: List[Tree], body: Tree): Tree = {
         val params0 :: Nil = mkVparamss(params :: Nil)
-        require(params0.forall { _.rhs.isEmpty }, "anonymous functions don't support default values")
+        require(params0.forall { _.rhs.isEmpty }, "anonymous functions don't support parameters with default values")
         Function(params0, body)
       }
 

src/reflect/scala/reflect/internal/Definitions.scala

@@ -481,7 +481,6 @@ trait Definitions extends api.StandardDefinitions {
 
     lazy val TypeCreatorClass      = getClassIfDefined("scala.reflect.api.TypeCreator") // defined in scala-reflect.jar, so we need to be careful
     lazy val TreeCreatorClass      = getClassIfDefined("scala.reflect.api.TreeCreator") // defined in scala-reflect.jar, so we need to be careful
-    lazy val LiftableClass         = NoSymbol
 
     lazy val BlackboxMacroClass           = getClassIfDefined("scala.reflect.macros.BlackboxMacro") // defined in scala-reflect.jar, so we need to be careful
          def BlackboxMacroContextValue    = BlackboxMacroClass.map(sym => getMemberValue(sym, nme.c))

src/reflect/scala/reflect/runtime/JavaUniverseForce.scala

@@ -318,7 +318,6 @@ trait JavaUniverseForce { self: runtime.JavaUniverse  =>
     definitions.MirrorClass
     definitions.TypeCreatorClass
     definitions.TreeCreatorClass
-    definitions.LiftableClass
     definitions.BlackboxMacroClass
     definitions.WhiteboxMacroClass
     definitions.BlackboxContextClass