mkmf.rb: timestamp_file

* lib/mkmf.rb (MakeMakefile#timestamp_file): remove @ which looks like
  configure variables.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37427 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,4 +1,7 @@
-Fri Nov  2 20:02:22 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Fri Nov  2 20:11:17 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (MakeMakefile#timestamp_file): remove @ which looks like
+	  configure variables.
 
 	* lib/mkmf.rb (MakeMakefile#timestamp_file): use .-. instead of !, a
 	  special character of NMAKE and BSD make.  [Bug #7265]

lib/mkmf.rb

@@ -1859,7 +1859,7 @@ preload = #{defined?($preload) && $preload ? $preload.join(' ') : ''}
   end
 
   def timestamp_file(name)
-    name = name.gsub(/(\$[({]|[})])|(\/+)|[^-.\w]+/) {$1 ? "@" : $2 ? ".-." : "_"}
+    name = name.gsub(/(\$[({]|[})])|(\/+)|[^-.\w]+/) {$1 ? "" : $2 ? ".-." : "_"}
     "./.#{name}.time"
   end
   # :startdoc: