Summary

Improves pretty printing of SQL function bodies by placing dollar-quote delimiters on their own lines for better readability.

Changes

• Added new token types DOLLAR_QUOTE_DELIMITER and DOLLAR_QUOTE_BODY to separately represent delimiter and content
• Modified emit_dollar_quoted_str_with_hint to emit delimiters and body on separate lines
• Added AST normalization for function body whitespace to ensure semantic equivalence in tests

Example

Before

create function add(a int, b int)
returns int
as $function$SELECT $1 + $2$function$
language sql;

After

create function add(a int, b int)
returns int
as $function$
SELECT $1 + $2
$function$
language sql;

This applies to all dollar-quoted function/procedure bodies including CREATE FUNCTION, CREATE PROCEDURE, and DO blocks.