[docs] IDLE documentation for Unix obsolete/incorrect (issue 5066)

[ezio.melotti at gmail.com]

I left a few comments.
I haven't reviewed the patch throughly though.


http://bugs.python.org/review/5066/diff/6694/Doc/library/idle.rst
File Doc/library/idle.rst (right):

http://bugs.python.org/review/5066/diff/6694/Doc/library/idle.rst#newcode162
Doc/library/idle.rst:162: Open a dialog to switch between indenting with
spaces and tabs
Shouldn't the note about using spaces instead of tabs be here?

http://bugs.python.org/review/5066/diff/6694/Doc/library/idle.rst#newcode340
Doc/library/idle.rst:340: * :kbd:`C-d` delete next character
Are these rendered correctly?  Isn't an empty line required between
entries?

http://bugs.python.org/review/5066/diff/6694/Doc/library/idle.rst#newcode354
Doc/library/idle.rst:354: are restricted to four spaces due to TCL/Tk
issues.)
s/issues/limitations/?

http://bugs.python.org/review/5066/