what changes the commit has.
Note that this diff output doesn't have its
lines prefixed with '#'. This diff will not be a part
- of the commit message.
+ of the commit message. See the `commit.verbose` configuration
+ variable in linkgit:git-config[1].
+
If specified twice, show in addition the unified diff between
what would be committed and the worktree files, i.e. the unstaged