FIX: no appending of attributes to repo, back to b2cc6a8d4a18 The idea was to good/unclean to be true. Raised unknown exception on commit when exiting $EDITOR with return 1. Integrate "innocent" changes since then though.

Describe substitution mechanism in doc

Debug info, not warning, when no files configured for expansion

Cycle filename patterns only once

Get modulename via function; set kwrepo attribs via direct reference

Move all that can be done only once per repo into reposetup Actually kwrepo is not set up if there aren't any files configured for keyword substitution. Stuff that now is done at reposetup and not at every filelog init or hook: 1) filename matching function 2) compilation of keyword regex 3) templates and changeset templater kwtemplater as an appended class should prevent namespace conflicts.

Extend templater.common_filters in kwtemplater

Document reposetup; recommend loading on per-repo basis

Implement configurable exclusion of files from expansion

Only initialize kwtemplater in kwfilelog if needed