Fix typos pointed out by Igor Sobrado in PR misc/19645 (some of these
have already been fixed by others):
groff(7) - repition (repetition), 2-characer (2-character),
lenght (length), ident (indent)
groff_man(7) - supressed (suppressed)
groff_markup(7) - SYNPOSIS (SYNOPSIS) (is it the "SYNOPSIS" section?)
groff_mm(7) - wich, defualt (default), centerered (centered),
behavies (behaves), argmuent (argument),
with a automatically (with an automatically),
Varable (Variable???), captial (capital),
argumenent (argument), specifed (specified),
excibits (is that word ok?), digitsized (digit-sized?),
lable (label)
troff(1) - environents (environments)
grohtml(1) - supress (suppress)
groff_font(5) - intepreted (interpreted)
groff_tmac(5) - constitue (constitute???)
(Changes also sent to gnu.org)