Show only commits between the named two commits. When
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
+ gitlink:git-rev-parse[1].
-p::
Show the change the commit introduces in a patch form.