Tried the following command:
git commit path/to/my/file.ext -m 'my notes'
Receive an error in git version 1.5.2.1:
error: pathspec '-m' did not match any file(s) known to git.
error: pathspec 'MY MESSAGE' did not match any file(s) known to git.
Is that incorrect syntax for singe file or directory commits?
For this the correct syntax would be:
git commit -m 'my notes' path/to/my/file.ext
Then you can git commit a single file directory.