Prefix for warnings (was: device-dependent warnings)

[Alejandro Colomar]

Hi Branden,

On 5/3/23 00:21, Alejandro Colomar wrote:
> 
> troff:man3/unlocked_stdio.3:123: warning [p 2, 1.8i, div '3tbd1,0', 0.3i]: 
> cannot break line
> 
> an.tmac:man4/cciss.4:164: style: blank line in input
> 
> man4/console_codes.4:324: warning: table wider than line length minus 
> indentation
> 

I find it more readable when there's one space between the program
that generates the warning and the file.  That's what mandoc(1) does,
and in general, what any program that relies on perror(3) does (I'm
assuming mandoc(1) probably calls perror(3) or similar).

Compare:

mandoc: man8/unitd.8:6:2: WARNING: first section is not "NAME": Sh Name
troff:man3/unlocked_stdio.3:123: warning [p 2, 1.8i, div '3tbd1,0', 0.3i]: 
cannot break line

I suggest adding such space, which BTW would allow you to call
perror(3) in some cases.

Cheers,
Alex

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