reword the pr man page -F -f section

[Dan Jacobson]

Dudes, fellas, the pr(1) man page:
              -F, -f, --form-feed

              use  form  feeds  instead  of  newlines to separate
              pages (by a 3-line page header with -F or a  5-line
              header and trailer without -F)

What are the chances that the average Joe will think that when you say
"without -F", you mean "with -f".  Happens every time with me.

My guess is that your page should be reworded:

              [note that -f is just an alias for -F] use form feeds
              instead of newlines to separate...

Sure, it is obvious in the Info page.

Also, as worded, it looks like if you don't use -F you will still get
form feeds.

Info says:

   Capital letter options dominate small letter ones.

Kinky.  I like it.  But what does it mean?  Don't tell me.  Put the
answer in the Info page.

By the way, in the man page I see unequal indentation, but maybe that
has been fixed already.

      -J, --join-lines
              merge  full  lines,  turns  off  -W line truncation, no column 
alignment,
              -S[STRING] sets separators

              -l PAGE_LENGTH, --length=PAGE_LENGTH
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