[PATCH 0 of 1] grep command searches history

[Bryan O'Sullivan]

Here's a first cut at a grep command.  It works much as you might expect.

$ hg grep -i symbolic README
README:327:114:- locations symbolically. Simply add a line with the name, a space, and
README:327:117:+ symbolically, add a section to it like this:
README:204:89:- # Give symbolic names to repos
README:204:102:+Symbolic repository names:
README:204:105:+ locations symbolically. Simply add a line with the name, a space, and
README:179:89:+ # Give symbolic names to repos

The fields above are file name, rev number, line number, and an indication
of whether a matching line was inserted or removed.

This code needs lots of work, but it's already useful.

	<b
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1 files changed, 203 insertions(+), 85 deletions(-)
mercurial/commands.py |  288 ++++++++++++++++++++++++++++++++++---------------