scanf.3: Clarify that %n supports type modifiers

My initial reading of this was that type modifiers were probably
not supported.  But they are, and this is actually documented
further up, in the type modifiers documentation.  But to make it
clearer, let's copy the language that printf(3) has in its %n
section.

Signed-off-by: Alyssa Ross <hi@alyssa.is>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
1 file changed