variablize.rb in facets-2.4.5

- old
+ new

@@ -3,10 +3,11 @@
   # Prepend an "@" to the beginning of a string
   # to make a instance variable name. This also replaces
   # non-valid characters with underscores.
 
   def variablize
-    "@#{self}".gsub(/\W/, '_').to_s
+    v = gsub(/\W/, '_')
+    "@#{v}"
   end
 
 end
 