lib/liquid/parser.rb in locomotivecms-liquid-2.6.0 vs lib/liquid/parser.rb in locomotivecms-liquid-4.0.0.alpha

@@ -64,13 +64,14 @@
 
     def argument
       str = ""
       # might be a keyword argument (identifier: expression)
       if look(:id) && look(:colon, 1)
-        str << consume << consume << ' '
+        str << consume << consume << ' '.freeze
       end
 
       str << expression
+      str
     end
 
     def variable_signature
       str = consume(:id)
       if look(:open_square)