either <since> or <until> is omitted, it defaults to
`HEAD`, i.e. the tip of the current branch.
For a more complete list of ways to spell <since>
- and <until>, see "SPECIFYING REVISIONS" section in
- linkgit:git-rev-parse[1].
+ and <until>, see linkgit:gitrevisions[1].
--no-decorate::
--decorate[=short|full|no]::