Add committer tag only when needed in git conversion
Convert from a git repo added a committer: tag in the log message
even if the committer and the author were the same person.
#!/bin/sh
hg init a
echo a > a/a
hg --cwd a ci -A -m a
hg clone a b
echo b > b/b
hg --cwd b ci -A -m b
chmod 100 a/.hg/store
hg --cwd b push ../a
chmod 700 a/.hg/store