`xx`; for example `%00` interpolates to `\0` (NUL),
`%09` to `\t` (TAB) and `%0a` to `\n` (LF).
-<pattern>::
+<pattern>...::
If one or more patterns are given, only refs are shown that
- match againt at least one pattern, either using fnmatch(3) or
+ match against at least one pattern, either using fnmatch(3) or
literally, in the latter case matching completely or from the
beginning up to a slash.