convert/svn: close gettags() log stream (issue2196)

convert/svn: remove useless try/catch While the try/catch was reintroduced in 2f0f9528e77b, it was made useless by the tags/ existence check in getheads().

Use our custom hg reStructuredText role some more I missed these occurrences on my first scan through the source.

minirst: handle line breaks in hg role

extdiff: fix reST syntax in module docstring

Fixed a bashism with trap numbers in hgeditor. When using trap in a shell script, it's more portable to use signal names, instead of numbers. Signal names (INT, KILL,...) are defined in POSIX, whereas its corresponding numbers aren't.

Merge with stable

rebase: stress that only local changesets should be rebased