- '%m': left, right or boundary mark
- '%n': newline
- '%x00': print a byte from a hex code
+- '%w([<w>[,<i1>[,<i2>]]])': switch line wrapping, like the -w option of
+ linkgit:git-shortlog[1].
NOTE: Some placeholders may depend on other options given to the
revision traversal engine. For example, the `%g*` reflog options will