this obsoletes: id:1353265498-3839-1-git-send-email-david@tethera.net Changes based on Mark's review - add commments for each function in tag-util.h - inline tag_op_list_from_string in the one place it was called - remove NULL terminator from tag_op_list (for mark); along with tag_op_list_t being opaque, I thought is was ok to leave off the comment on ops. But I could be convinced. - make tag_op_list_t typedef opaque - add BE_GENEROUS flag to parser. Currently this enables empty tags. - handle blank lines and comments in restore and batch tagging - fixed the commit message about "notmuch-new" Changes based on Ethan's review: - remove the dreaded . from first line of commit messages - convert if on l49 of database-test.c into explicit return on error - add comments and parens for num_tags and this_mid_len in random_corpus.c - add check for message-id's less than length 1. I wasn't sure why we would disallow all message ids of length 1. - remove declaration of parse_tag_stream - explain "query_string += 3" - fix typo in notmuch-dump.1