IDLE doc: improve Startup failure subsection. (GH-18771)


Eliminate repeat of 'Options', reported by Jules Lasne, and improve wording elsewhere.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
(cherry picked from commit ce305d641074931e4e790f7a83e28f74910644e5)

Co-authored-by: Jules Lasne (jlasne) <jules.lasne@gmail.com>
1 file changed