This flag allows a full text search on man pages. Although this is a last resort
option, it can be useful to pin point a certain man page.
It can be used with -S to narrow the search.
Unlike the Linux version, the search takes place in the rendered text so it
avoids false-positives when the text is found in comments in the source files.
It relies on egrep(1) and mandoc(1) to do its job. man.sh assumes
mandoc(1) is available anyway. Errors are discarded silently. I do not see
any advantages to check the existence of the directories in MANPATH before
Add man page documentation and EXAMPLES.
man -w -K '\<arm\>' -S 1:8