Manpage was including the text .5v at the end of some paragraphs. This

was caused by an old hack in the Makefile which removed the text .sp,
which was accidently added to the end of some paragraphs. (sed -i
's/\.sp//') Looks like this hack is not needed any longer so it was just
commented out and so the .5v disappeared (which might have been the text
".sp 5v")
Fixed some typos in the manpages and removed duplicated text