fixed reversing EW (save as)

when the file name changes, there will no longer be a use-less
save point file. instead the new file is deleted upon rubout.
 * save points are properly created if a file already exists
   with the same name, even though it was not known to SciTECO before
   the save. (e.g. you do save-as to a file that already exists).
 * more effects of the save command can now be rubbed out correctly

0 files changed, 0 insertions, 0 deletions