I found that SILENT was reported as missing in one of the check scripts
under doc/refcard:
make vcheck:
man only 1: SILENT
txivarcheck was changed to ignore this variable in texi2any on
2024-04-06 (fdc9653fa8adf13a):
* doc/refcard/txivarcheck (read_tp): filter out the 'SILENT'
customization variable that is not interesting to document as it does
nothing, and the customization variables starting with XS_ that are
not documented on purpose.
SILENT is still documented in the manual as equivalent to --silent. However,
it does not work. For example,
../tp/texi2any.pl --pdf --silent ../doc/info-stnd.texi
prints nothing. But
../tp/texi2any.pl --pdf -c SILENT=1 ../doc/info-stnd.texi
prints all the output from pdftex that you would expect.
I am going to try to remove this variable and any mention in the documentation.
