[bug #59608] sample_docs.mom: error: an argument has a 'p' unit attached

[Peter Schaffter]

Follow-up Comment #5, bug #59608 (project groff):

1) Mark significant trailing space as such, that is not just "...abc \"
  but
"...abc \"significant trailing space

Marking significant trailing space with just the slash-quote follows the
recommendation made by Werner some years ago.  With nothing after it, it
already means "the foregoing space is significant."  Adding the comment
afterwards would be tautological.

Not sure what you mean by "2) Show all arguments in a diagnostic message."  Do
you mean every argument that was passed to the macro?  What would be the
advantage?  A user needs only know the offending calling macro, its position
in the file, which arg is bad ("first," "second"... or "arg to <keyword"), and
why.  Listing additional correct arguments serves no purpose and could, in
some instances, add a huge amount noise.  Some of the _STYLE macros have over
ten keyword/value pairs as arguments.    

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