lib/mutant/matcher/config.rb in mutant-0.11.25 vs lib/mutant/matcher/config.rb in mutant-0.11.26

@@ -9,10 +9,10 @@
         :subjects,
         :start_expressions,
         :diffs
       )
 
-      INSPECT_FORMAT      = "#<#{self} %s>"
+      INSPECT_FORMAT      = "#<#{self} %s>".freeze
       ATTRIBUTE_DELIMITER = ' '
       ATTRIBUTE_FORMAT    = '%s: [%s]'
       ENUM_DELIMITER      = ','
       EMPTY_ATTRIBUTES    = 'empty'
       PRESENTATIONS       = {