wrefresh() on edit instead of curscr, since slang's curses emulation
doesn't include a curscr equivalent; and revert Jordi's removal of a
space in the main help text, as its second paragraph won't be properly
indented by one space without it


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2487 35c25a1d-7b9e-4130-9fde-d3aeb78583b8