lib/graphql/language/token.rb in graphql-1.9.5 vs lib/graphql/language/token.rb in graphql-1.9.6

@@ -2,9 +2,13 @@
 module GraphQL
   module Language
     # Emitted by the lexer and passed to the parser.
     # Contains type, value and position data.
     class Token
+      if !String.method_defined?(:-@)
+        using GraphQL::StringDedupBackport
+      end
+
       # @return [Symbol] The kind of token this is
       attr_reader :name
       # @return [String] The text of this token
       attr_reader :value
       attr_reader :prev_token, :line, :col