Merge pull request scala#4839 from SethTisue/reword-dependent-type-error

less confusing wording for a dependent method type error

Author: SethTisue

src/compiler/scala/tools/nsc/typechecker/ContextErrors.scala

@@ -1190,7 +1190,7 @@ trait ContextErrors {
 
       def IllegalDependentMethTpeError(sym: Symbol)(context: Context) = {
         val errorAddendum =
-          ": parameter appears in the type of another parameter in the same section or an earlier one"
+          ": parameter may only be referenced in a subsequent parameter section"
         issueSymbolTypeError(sym,  "illegal dependent method type" + errorAddendum)(context)
       }
 

test/files/neg/depmet_1.check

@@ -1,7 +1,7 @@
-depmet_1.scala:2: error: illegal dependent method type: parameter appears in the type of another parameter in the same section or an earlier one
+depmet_1.scala:2: error: illegal dependent method type: parameter may only be referenced in a subsequent parameter section
   def precise0(y: x.type)(x: String): Unit = {}
                           ^
-depmet_1.scala:3: error: illegal dependent method type: parameter appears in the type of another parameter in the same section or an earlier one
+depmet_1.scala:3: error: illegal dependent method type: parameter may only be referenced in a subsequent parameter section
   def precise1(x: String, y: x.type): Unit = {}
                ^
 depmet_1.scala:4: error: not found: value y