* progmodes/octave.el (inferior-octave-startup)

* progmodes/octave.el (inferior-octave-startup)
(inferior-octave-completion-table)
(inferior-octave-track-window-width-change)
(octave-eldoc-function-signatures, octave-help)
(octave-find-definition): Use single quoted strings.
(inferior-octave-startup-args): Change default value.
(inferior-octave-startup): Do not hard code "-i" and
"--no-line-editing".
(inferior-octave-resync-dirs): Add optional arg NOERROR.
(inferior-octave-directory-tracker): Use it.
(octave-goto-function-definition): Robustify.
(octave-help): Support highlighting operators in 'See also'.
(octave-find-definition): Find subfunctions only in Octave mode.