lib/mutant/differ.rb in mutant-0.5.3 vs lib/mutant/differ.rb in mutant-0.5.4

@@ -22,10 +22,10 @@
       when 1
         Diff::LCS::Hunk.new(old, new, diffs.first, max_length, 0)
           .diff(:unified) << "\n"
       else
         $stderr.puts(
-          'Mutation resulted in more than one diff, should not happen! ' +
+          'Mutation resulted in more than one diff, should not happen! ' \
           'PLS report a bug!'
         )
         nil
       end
     end