Fix issue with declaration

Author: ZachWatkins

lang/tags/functions.talon

@@ -22,7 +22,7 @@ tag: user.code_functions
 # for annotating function parameters
 is type <user.code_type>: user.code_insert_type_annotation(code_type)
 returns [type] <user.code_type>: user.code_insert_return_type(code_type)
-returns class <user.text>
+returns class <user.text>:
     formatted = user.formatted_text(text, "PUBLIC_CAMEL_CASE")
     insert(": {formatted}")