shows what would be committed if the same options are given to
`git-commit`.
+If any paths have been touched in the working tree (that is,
+their modification times have changed) but their contents and
+permissions are identical to those in the index file, the command
+updates the index file. Running `git-status` can thus speed up
+subsequent operations such as `git-diff` if the working tree
+contains many paths that have been touched but not modified.
+
OUTPUT
------