pg_get_viewdef 7.4 parentheses

While implementing a function for making view definitions look prettier  
in pgadmin3, I had a look at ruleutils.c to examine why there are tons 
of parentheses coming out of pg_get_viewdef. I believe that some are 
really not needed.

These are:
- get_rule_expr, for CASES T_RelabelType and T_CoerceToDomain. The cast 
is always bound to the near left variable, so it can be left out.
- get_from_clauses for ON. Operators will deliver what is needed.

for get_rule_expr and get_from_clauses(JOIN part), parentheses could be 
omitted if the top-level expression is evaluated.

Do you agree?

Regards,
Andreas