bpo-37903: IDLE: add shell sidebar mouse interactions (GH-25708)

Left click and drag to select lines.  With selection, right click for context menu with copy and copy-with-prompts.
Also add copy-with-prompts to the text-box context menu.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

1 files changed, 26 insertions, 0 deletions

diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst
index 223ab65..eb452b0 100644
--- a/Doc/whatsnew/3.10.rst
+++ b/Doc/whatsnew/3.10.rst
@@ -994,6 +994,32 @@ hmac
 The hmac module now uses OpenSSL's HMAC implementation internally.
 (Contributed by Christian Heimes in :issue:`40645`.)
 
+IDLE and idlelib
+----------------
+
+Make IDLE invoke :func:`sys.excepthook` (when started without '-n').
+User hooks were previously ignored.  (Patch by Ken Hilton in
+:issue:`43008`.)
+
+This change was backported to a 3.9 maintenance release.
+
+Add a Shell sidebar.  Move the primary prompt ('>>>') to the sidebar.
+Add secondary prompts ('...') to the sidebar.  Left click and optional
+drag selects one or more lines of text, as with the editor
+line number sidebar.  Right click after selecting text lines displays
+a context menu with 'copy with prompts'.  This zips together prompts
+from the sidebar with lines from the selected text.  This option also
+appears on the context menu for the text.  (Contributed by Tal Einat
+in :issue:`37903`.)
+
+Use spaces instead of tabs to indent interactive code.  This makes
+interactive code entries 'look right'.  Making this feasible was a
+major motivation for adding the shell sidebar.  Contributed by
+Terry Jan Reedy in :issue:`37892`.)
+
+We expect to backport these shell changes to a future 3.9 maintenance
+release.
+
 importlib.metadata
 ------------------