Hello Stefan, JordiGH and John,

Based on our discussion on #octave and email, I have made a patch for
review. For convenience octave.el with the patch applied is available
from http://bpaste.net/raw/94528/. Note Emacs 24.3 is required.

The new command octave-update-function-file-comment let users update the
doc-string/doc-comment (per octave's definition) to the function name. I
am only just beginning octave. So please help test and review the patch.

Thanks.
Leo