refreshing query id for pg_stat_statements based on comment in sql

Hi,
Currently the query id for pg_stat_statements gets calculated based on the
parse nodes specifics.
This means that the user cannot add a comment to a SQL query to test
something. (though some other RDBMS allows this practice).

Consider this use case: for query q, admin looks at stats and performs some
optimization (without changing the query). Admin adds / modifies the
comment for q - now the query becomes q'. If query id doesn't change, there
still would be one row in pg_stat_statements which makes it difficult to
gauge the effectiveness of the tuning.

I want to get opinion from the community whether adding / changing comment
in SQL query should result in new query id for pg_stat_statements.

Cheers