[bug #65664] tmac/an-ext.tmac: missing test for a definition of variable 'mG'

[G. Branden Robinson]

Update of bug #65664 (group groff):

                  Status:                    None => Rejected               
             Assigned to:                    None => gbranden               
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #1:


> There is a missing test after the comment about 'mG'

I don't agree.

an-ext.tmac is not a stand-alone macro file; like mdoc/doc-common, it is meant
only to be sourced by its parent.

> test-nroff -ww -z an-ext.tmac

The foregoing is (1) therefore an invalid experiment and (2) there is no such
thing as "test-nroff" in GNU _roff_.

> .if !r mG

This uses extended _groff_ syntax and is not portable to AT&T/DWB/Solaris
10/Plan 9 _troffs_.

The point of this file is to be portable to such formatters.

_groff_man_(7):

       /.../share/groff/1.23.0/tmac/an-ext.tmac
              Except for .SB, definitions of macros described above as
              extensions are contained in this file; in some cases, they
              are simpler versions of definitions appearing in an.tmac,
              and are ignored if the formatter is GNU troff.  They are
              written to be compatible with AT&T troff and permissively
              licensed—not copylefted.  To reduce the risk of name space
              collisions, string and register names begin only with “m”.
              We encourage man page authors who are concerned about
              portability to legacy Unix systems to copy these
              definitions into their pages, and maintainers of troff
              implementations or work‐alike systems that format man
              pages to re‐use them. ...


An AT&T-compatible formatter will define the `mG` register as zero upon its
first interpolation, which produces intended results.

Rejecting.



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