lib/rubocop/cop/mixin/space_before_punctuation.rb in rubocop-0.35.1 vs lib/rubocop/cop/mixin/space_before_punctuation.rb in rubocop-0.36.0

@@ -1,12 +1,13 @@
 # encoding: utf-8
+# frozen_string_literal: true
 
 module RuboCop
   module Cop
     # Common functionality for cops checking for space before
     # punctuation.
     module SpaceBeforePunctuation
-      MSG = 'Space found before %s.'
+      MSG = 'Space found before %s.'.freeze
 
       def investigate(processed_source)
         processed_source.tokens.each_cons(2) do |t1, t2|
           next unless kind(t2) && t1.pos.line == t2.pos.line &&
                       t2.pos.begin_pos > t1.pos.end_pos &&