This fixes issue 1569. hg churn <path> now returns only the number
of lines changed in the path, if the path is specified by filtering
files through a match filter at the changeset level. test-churn
has been updated to take care of this issue.
Changes docstrings to begin with a lowercase word. Only docstrings
used in help output is changed.
Scripts are not expected to grep the output of 'hg help' so this
change should pose no problem with regard to the compatibility rules.
Implemented as two functions: diffstat, which yields lines of text,
formatted as a usual diffstat output, and diffstatdata, which is called
inside diffstat to do real performing and yield file names with
appropriate data (numbers of added and removed lines).
- use contexts
- use ui.pushbuffer and patch.diff to greatly simplify patch generation
- simplify diff counting logic
- fold all the counting functions together
- simplify progress math
- simplify padding function
- kill graph helper function
- simplify alias reading
- use Schwartzian transform on stats
- change some notes to debugs
