Merge branch 'jk/git-pm-bare-repo-fix'

In Git 2.39, Git.pm stopped working in a bare repository, which has
been corrected.

* jk/git-pm-bare-repo-fix:
  Git.pm: use "rev-parse --absolute-git-dir" rather than perl code
  Git.pm: fix bare repository search with Directory option

diff --cc perl/Git.pm
Simple merge

diff --cc t/t9700/test.pl
Simple merge