This change is three fold but I'm willing to split this in parts if necessary.
- Add a small description before the EXAMPLES that are already in the man page. It is always better to explicitely state what we are trying to show instead of having the user guess what the example is doing. Even for simple cases.
- Add two more examples to show usage of -s, -t and -f
- mandoc -Tlint reports irrelevant use of .Tn so remove them since according to mdoc(7) it is there only for compatibility and should not be used in new manuals.
I did not run any atf(7) tests but having a look at the script in test/ I
can't see anything related to the manual page.