Re: [patch] Document '%F' format specifier

[Siddhesh Poyarekar <siddhesh@gotplt.org>]

On 2023-01-18 21:43, Paul Pluzhnikov via Libc-alpha wrote:
> The '%F' specifier was implemented in commit 6c46718f9f0 on
> 2000-08-23, but remains undocumented in the manual.
> https://stackoverflow.com/questions/75157669/format-specifier-f-missing-from-glibcs-documentation
> 
> Fix that.
> 

The patch fails to apply on master.  Also, the specifier needs to be 
mentioned in the Floating-Point Conversions section alongside %f 
wherever applicable.  Other than the first line that mentions all format 
specifiers, there are lines like:

The @samp{%g} and @samp{%G} conversions print the argument in the style
of @samp{%e} or @samp{%E} (respectively) if the exponent would be less
than -4 or greater than or equal to the precision; otherwise they use
the @samp{%f} style.

where I think mentioning @samp{%F} would be useful.  i.e. wherever the 
lower and upper options are mention together, do the same for %f too.

Please also review other sections in stdio.texi that mention %f and add 
%F wherever applicable, e.g. input conversions.

Thanks,
Sid