[Python-Dev] patch to make IDLE load IDLESTARTUP/PYTHONSTARTUP on restart

[Mitchell L Model]

I have submitted patches to idlelib/PyShell.py for Python 2.7 (Issue 
5233) and 3.1 (5234), made against local repository copies as updated 
an hour ago. The purpose of the patch is to have IDLE load 
IDLESTARTUP or PYTHONSTARTUP on restart.

Along the way I also made -s the default so IDLESTARTUP or 
PYTHONSTARTUP gets loaded when IDLE is started by double-clicking 
rather than from the command line (no reasonable way for the user to 
get the -s switch into IDLE.app on the Mac). I decided that on 
restart IDLE should load the file that was loaded when it started in 
the first place, on the off chance that something had changed in the 
interim.

I changed the meaning of the -s switch to take an argument that is an 
alternate startup file to load instead of IDLESTARTUP or 
PYTHONSTARTUP. It might be better, though, to leave -s as it is and 
mark it deprecated or obsolete or the default or whatever and use a 
different letter to specify a load file.

I added a switch -q to suppress loading of the startup file.