remove macro instances from arbitrary string width specifiers. for example

-width ".Dv BOB" -> -width "BOB"

although they are not errors, they are misleading and probably should
not get pasted aro

remove macro instances from arbitrary string width specifiers. for example

-width ".Dv BOB" -> -width "BOB"

although they are not errors, they are misleading and probably should
not get pasted around

show more ...

use fancy .In macro for includes. from Jan Klemkow. ok jmc schwarze

tweak previous; ok martynas

Document C99 floating-point environment.