[bug #60504] [PATCH] document .PF macro in pic(1) and add it to -mpic

[Dave]

Follow-up Comment #2, bug #60504 (project groff):

I've updated the patch with one additional change.  It turns out pic itself
didn't support .PF as fully as it could.

Part of pic's output includes empty definitions of .PS and .PE if they're not
already defined.  This can be seen by giving it empty input:


$ pic < /dev/null
.do if !dPS .ds PS
.do if !dPE .ds PE
.lf 1 -
$ 


The updated patch now adds a dummy .PF to this output.

This will ameliorate the problem in the macro packages (listed in comment #1)
that include a .PE but no .PF definition.

(file #51504)
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Additional Item Attachment:

File name: pic.patch                      Size:3 KB
    <https://file.savannah.gnu.org/file/pic.patch?file_id=51504>



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