* .gdbinit (rp): mark singleton classes.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28086 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

.gdbinit

@@ -105,7 +105,7 @@ define rp
     print (struct RObject *)($arg0)
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_CLASS
-    printf "T_CLASS: "
+    printf "T_CLASS%s: ", ($flags & RUBY_FL_SINGLETON) ? "*" : ""
     print (struct RClass *)($arg0)
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_ICLASS