[Groff] Need of protecting significant space at end of lines and removing others

[Bjarni Ingi Gislason]

  There are a lot of lines (about 3500?) that end with one or more space
characters. Some of them are significant, and may thus not be removed. 
Those in the directory "tmac" have been protected (\" ...) with a patch, see
bug #51106 ("[PATCH] Protect significant space at the end of lines").

  Those who fix something, should also remove insignificant space at the
end of lines in those files they patch, and protect those space characters
that are not.

  "git" issues a warning when there is a space character at the end of an
updated line.

-- 
Bjarni I. Gislason