Rex::Text.refine: removed redundant Array operations

lib/rex/text.rb

@@ -242,13 +242,8 @@ module Text
     # get the words of the second str in an array
     o_words = to_words( str2 )
 
-    # get all the words that are different between the 2 arrays
-    changes  = s_words - o_words
-    changes << s_words - o_words
-    changes.flatten!
-
     # get what hasn't changed (the rdiff, so to speak) as a string
-    (s_words - changes).join
+    (s_words - (s_words - o_words)).join
   end
 
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