fixed hyphens according to /usr/share/doc/groff-base/README.Debian



git-svn-id: https://ilk.uvt.nl/svn/sources/Frog/trunk@17898 12f355fe-0486-481a-ad91-c297ab22b4e3
typo


git-svn-id: https://ilk.uvt.nl/svn/sources/Frog/trunk@17899 12f355fe-0486-481a-ad91-c297ab22b4e3