rework the file-writing routines so that they can work properly with
already-opened files, such as the mkstemp()-created files used by the
spell-checking code


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2571 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
4 files changed