Document that 'git -C ""' works and doesn't change directory

It's been behaving so since 6a536e2076 (git: treat "git -C '<path>'" as a no-op when <path> is empty, 2015-03-06). Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

SZEDER Gábor committed Jun 29, 2019 at 10:24 UTC 1a64e07d235579ae0b3bc6d1f081a51a6e48a4d1
1 file changed +2 -1
Documentation/git.txt
+2 -1
@@ -56,7 +56,8 @@ help ...`.
56 Run as if git was started in '<path>' instead of the current working
57 directory. When multiple `-C` options are given, each subsequent
58 non-absolute `-C <path>` is interpreted relative to the preceding `-C
59 - <path>`.
59 + <path>`. If '<path>' is present but empty, e.g. `-C ""`, then the
60 + current working directory is left unchanged.
61 +
62 This option affects options that expect path name like `--git-dir` and
63 `--work-tree` in that their interpretations of the path names would be