keyword: clarify object of backwards compatibility

commit: write last-message.txt with no content modifications. This assumes the user will use either a sane editor (anything but Notepad) or the same editor again: even Notepad should be able to read what it previously wrote.

mail: add parseaddrlist() function for parsing many addresses at once Adds a new function addrlistencode() to mercurial.mail, like addressencode(), but accepts a list of addresses as input, and returns a list of formatted addresses. This will be used by patchbomb. The difference is that each element in the input list can contain multiple addresses (comma separated or otherwise), and are split using Python's email.Utils.getaddresses().

patchbomb: fix parsing of multiple addresses, allow multiple addrs in --to/cc/bcc Instead of using custom code to split apart addresses, we now use mail.parseaddrlist() which always does the Right Thing as it relies on Python's email.Utils.getaddresses(). Previously, 'hg email --to=foo,bar' only respected foo and discarded bar. Also, commas in names were not allowed in hgrc or the interactive prompt; specifying '"Lastname, Firstname" <foo>' would confuse patchbomb. The testcase uses '-m tmp.mbox' because -n (like in other tests) would disable address mangling.

templates: add raw templates for tags/branches pages

extdiff: wrap long lines in docstring and comments Gettext wraps lines in the messages when it writes them to the hg.pot file and that makes long lines look odd in the resulting .po file.

Merge with stable