The System Preferences Dock "prefer tabs always" setting disables some
IDLE features.  Menus are a bit different than as described for Windows
and Linux.

A program that runs indefinitely can overfill memory.

Add a new subsection to the doc.

The section is renamed from "IDLE -- console differences".  It mostly
covers the implications of using custom sys.stdxxx objects.

Topics include opening, title and status bar, .py* extension, and running.

Add a paragraph in "Help and preferences", "Help sources" subsection.

Users can now click on context lines.

'Strip trailing whitespace' is not limited to spaces.  Wording caters to beginners who
do know know the meaning of 'whitespace'.  Multiline string literals are not skipped.

* News blurb.

IDLE calls tcl/tk update in the background in order to make live
interaction and experimentatin with tkinter applications much easier.

As needed for the conversion of extensions to features.

About 10 IDLE features were implemented as supposedly optional
extensions.  Their different behavior could be confusing or worse for
users and not good for maintenance.  Hence the conversion.

The main difference for users is that user configurable key bindings
for builtin features are now handled uniformly.  Now, editing a binding
in a keyset only affects its value in the keyset.  All bindings are
defined together in the system-specific default keysets in config-
extensions.def.  All custom keysets are saved as a whole in config-
extension.cfg.  All take effect as soon as one clicks Apply or Ok.

The affected events are '<<force-open-completions>>', '<<expand-word>>',
'<<force-open-calltip>>', '<<flash-paren>>', '<<format-paragraph>>',
'<<run-module>>', '<<check-module>>', and '<<zoom-height>>'.  Any
(global) customizations made before 3.6.3 will not affect their keyset-
specific customization after 3.6.3. and vice versa.

Inital patch by Charles Wohlganger, revised by Terry Jan Reedy.

When IDLE fail to start because the socket connection fails, direct people to a new subsection of the IDLE doc listing various causes and remedies.

Patch by Roger Serwy, updated by Bayard Randel.

Patch by Julien Palard.

Reformat header above separator line (added if missing) to a common format.
Patch by Yoni Lavi.

The reload(sys) effect was the crux of a Stackoverflow question.

tab in the IDLE Preferences dialog.  Code patch by Mark Roseman.

curious users.  The previous user content is now in the IDLE doc and is
redundant.  IDLE now means 'Integrated Development and Learning Environment'.

to finish making current README.txt obsolete.

Some were missing and notes were not correct.

Fixed the case of the "Ctrl-" prefixes.

on OS X.  Original patch by André Freitas.

Patch by Al Sweigart.

and case.  Edit some of the explanatory sentences and end all with a period.