Make local dummies legal parts of methods.

< and > are invalid in method names, so we now use ( and ) instead.
local dummies can end up as parts of method names that are made not private.

Author: odersky

src/dotty/tools/dotc/core/StdNames.scala

@@ -104,7 +104,7 @@ object StdNames {
     val INTERPRETER_LINE_PREFIX: N    = "line"
     val INTERPRETER_VAR_PREFIX: N     = "res"
     val INTERPRETER_WRAPPER_SUFFIX: N = "$object"
-    val LOCALDUMMY_PREFIX: N          = "<local "       // owner of local blocks
+    val LOCALDUMMY_PREFIX: N          = "(local "       // owner of local blocks
     val MODULE_SUFFIX: N              = NameTransformer.MODULE_SUFFIX_STRING
     val AVOID_CLASH_SUFFIX: N         = "$_avoid_name_clash_$"
     val MODULE_VAR_SUFFIX: N          = "$module"
@@ -714,7 +714,7 @@ object StdNames {
       (0 until num).map(syntheticParamName)(breakOut)
 
     def localDummyName(clazz: Symbol)(implicit ctx: Context): TermName =
-      LOCALDUMMY_PREFIX ++ clazz.name ++ ">"
+      LOCALDUMMY_PREFIX ++ clazz.name ++ ")"
 
     def newBitmapName(bitmapPrefix: TermName, n: Int): TermName = bitmapPrefix ++ n.toString