Re: Fix for normalization of foreign idents

Hi,

Marcus Comstedt wrote:

  $Id: blah$ --(c_t_w_t)--> $Id: blah$ --(c_t_g)--> $Id: blah$

This restores correct and deterministic operation of status and
diff, meaning that if the file hasn't actually been modified, no
modifications are shown.

As you might suggest, always keeping the foreign ident would mean it
is never updated when you commit new versions of the file, which isn't
really what we want.  Keeping the foreign ident as long as the last
modification to the file was made in the previous version control
system makes perfect sense, but once we make a commit to the file
within git, it should be replaced with a git ident.

I was with you up to here.  Is commit time really the right moment
to clobber a foreign ident?  I suspect it would be confusing.

It might be simpler to just never clobber a foreign ident and instead
rely on local policy (scripts, pre-commit hooks, and so on) to remove
them at the appropriate time.