Issue #22695: Fix syntax of open() doc

--HG--
branch : 3.4
Merge 3.4 (open doc)
Issue #22592: Drop support of the Borland C compiler to build Python

The distutils module still supports it to build extensions.
Issue #3068: Add Idle extension configuration dialog to Options menu.
Original patch by Tal Einat.

--HG--
branch : 3.4
Merge with 3.4 #3068