Fix bug by which [NSString mutableCopy] returned a String, not NSString.

([String -copyWithZone:]): Renamed from -copy.
([String -mutableCopyWithZone:]): Renamed from -mutableCopy.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@577 72102866-910b-0410-8b05-ffd578937521

Source/String.m

@@ -258,14 +258,14 @@
   return [self cStringCopyRange:((IndexRange){0, [self count]})];
 }
 
-- copy
+- copyWithZone: (NSZone*)z
 {
-  return [[[self class] alloc] initWithString:(NSString*)self];
+  return [[[self class] allocWithZone:z] initWithString:(NSString*)self];
 }
 
-- mutableCopy
+- mutableCopyWithZone: (NSZone*)z
 {
-  return [[MutableCString alloc] initWithString:(NSString*)self];
+  return [[MutableCString allocWithZone:z] initWithString:(NSString*)self];
 }
 
 // TESTING;