restructure helptable When looking up a help topic, the key is now only matched against the short names for each topic, and not the header. So hg help 'Environment Variables' must be replaced with hg help env

Do not try to load extensions twice (issue811)

enhance the error output in case of failure during http push

tag: without a checkout, base the tag changeset on tip instead of nullid issue916

use Exception(args)-style raising consistently (py3k compatibility)

fetch: added support for named branches Previously, fetch didn't really work when there were multiple named branches in the repository. Now it tries to do the right thing(tm) in all situations.

branch: added more support for named branches hg branch now has a -C (--clean) option, to reset the current (dirstate) branch to the branch of the last commit (first parent).

do not pretend to lock static-http repositories (issue994)

c0bd7d8b69ef uses err() instead of warn() but prototype doesn't match we might want to make warn() look more like err() in the future to avoid this kind of problem.

i18n: mark command line for translation