for consistency with nano 1.2.x and with other editors, make the mode of

for consistency with nano 1.2.x and with other editors, make the mode of
newly created files 666 instead of 600 before it's modified by the
umask; also add a few more minor comment fixes

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1838 35c25a1d-7b9e-4130-9fde-d3aeb78583b8