I reviewed your patch. At a first glance, I have the below comments.
The below change crosses the 80-character limit in a line. Please maintain the same. - "LARGE OBJECT", "TABLESPACE", "TEXT SEARCH", "ROLE"); + "LARGE OBJECT", "TABLESPACE", "TEXT SEARCH", "TRANSFORM FOR", "ROLE");
There are trailing whitespaces after COMPLETE_WITH_QUERY(Query_for_list_of_languages);. Remove these extra whitespaces. surajkhamkar@localhost:tab_comment$ git apply fix_tab_complete_comment.patch fix_tab_complete_comment.patch:38: trailing whitespace. COMPLETE_WITH_QUERY(Query_for_list_of_languages); warning: 1 line adds whitespace errors.
