[issue28097] IDLE: document all key bindings, add menu items for more.

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Response to history issues raised in PR:
1. Not erasing output/history is a feature: some shells save and restore recent history when close and open.  Shell restart is an alternative to that.  I fairly often replay statements after restart.
2. I think turning off cycling is feature bloat.  (I never do so for search.)
3. The one history feature that multiple people have asked for, on another issue, is retrieval with up/down arrow, as seems to be standard.  I now agree.

For items going under edit, which is already 'full', submenus will be needed.  Since history is Shell only, separate entries are ok, at least for now, instead of 'History' and a submenu with 'previous' and 'next'.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue28097>
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