Update only files that git already knows about. This is similar
to what "git commit -a" does in preparation for making a commit,
except that the update is limited to paths specified on the
- command line. If no paths are specified, all tracked files are
+ command line. If no paths are specified, all tracked files in the
+ current directory and its subdirectories are updated.
Don't add the file(s), but only refresh their stat()