lib/rouge/lexer.rb in rouge-3.15.0 vs lib/rouge/lexer.rb in rouge-3.16.0

@@ -207,10 +207,11 @@
       end
 
       # Determine if a lexer has a method named +:detect?+ defined in its
       # singleton class.
       def detectable?
-        @detectable ||= methods(false).include?(:detect?)
+        return @detectable if defined?(@detectable)
+        @detectable = singleton_methods(false).include?(:detect?)
       end
 
     protected
       # @private
       def register(name, lexer)