* What led up to the situation?

     Checking for defects with a new version

test-[g|n]roff -mandoc -t -K utf8 -rF0 -rHY=0 -rCHECKSTYLE=10 -ww -z < "man page"

  [Use "groff -e ' $' -e '\\~$' <file>" to find obvious trailing spaces.]

  ["test-groff" is a script in the repository for "groff"; is not shipped]
(local copy and "troff" slightly changed by me).

  [The fate of "test-nroff" was decided in groff bug #55941.]

   * What was the outcome of this action?


troff:<stdin>:3: warning: register 'zZ' not defined
an.tmac:<stdin>:5: style: .TH missing third argument; consider document modification date in ISO 8601 format (YYYY-MM-DD)
an.tmac:<stdin>:5: style: .TH missing fourth argument; consider package/project name and version (e.g., "groff 1.23.0")
troff:<stdin>:13: warning: name 'zZ' not defined
troff:<stdin>:44: warning: trailing space in the line
an.tmac:<stdin>:139: style: use of deprecated macro: .PD
an.tmac:<stdin>:144: style: use of deprecated macro: .PD
an.tmac:<stdin>:149: style: use of deprecated macro: .PD


   * What outcome did you expect instead?

     No output (no warnings).

-.-

  General remarks and further material, if a diff-file exist, are in the
attachments.

Hello,

Thanks for the patch.  Since it's a modification directly upstream,
could you please forward the patch to them?

Thank you,

  Hi,

  I do not send reports upstream if I have to get an account there.
The Debian maintainers have one already.

-.-

From "/usr/share/doc/debian/bug-reporting.txt.gz":

  Don't file bugs upstream

   If you file a bug in Debian, don't send a copy to the upstream software
   maintainers yourself, as it is possible that the bug exists only in
   Debian. If necessary, the maintainer of the package will forward the
   bug upstream.

-.-

  If I get a negative (or no) response from upstream, I send henceforth
bugs to Debian.