help: move option text display into a helper function

help: move 'additional help topics' code

help: rename option_lists to optlist

help: drop with_version If --version is specified, we print the version and exit (as documented).

dispatch: don't rewrap aliases that have the same definition Previously aliases that overrode existing commands would wrap the old alias on every call to dispatch() (twice actually), which is an obvious re-entrancy issue for things like the command server or TortoiseHG.

url: really handle urls of the form file:///c:/foo/bar/ correctly 28edd65000d9 made sure that paths that seemed to start with a windows drive letter would not get an extra leading slash. localpath should thus not try to handle this case by removing a leading slash, and this special handling is thus removed. (The localpath handling of this case was wrong anyway, because paths that look like they start with a windows drive letter can't have a leading slash.) A quick verification of this is to run 'hg id file:///c:/foo/bar/'.

wireproto: add out-of-band error class to allow remote repo to report errors Older clients will still print the provided error message and not much else: over ssh, this will be each line prefixed with 'remote: ' in addition to an "abort: unexpected response: '\n'"; over http, this will be the '---%<---' banners in addition to the 'does not appear to be a repository' message. Currently, clients with this patch will display 'abort: remote error:\n' and the provided error text, but it is trivial to style the error text however is deemed appropriate.

windows: fix pyflakes warning on unused imports This is ugly, but only marginally uglier than before, and it avoids hacking/disabling our pyflakes test