Problem: Various code not covered by tests.
Solution: Add a few more test. (Yegappan Lakshmanan, closesvim/vim#7995)
1f448d906b
Cherry-pick some test_edit.vim changes from patches 8.2.{1022,1432}.
Reorder test_undo.vim to match upstream.
Problem: Modifiers not simplified when timed out or using feedkeys() with
'n" flag.
Solution: Adjust how mapped flag and timeout are used. (closesvim/vim#10305)
68a573ce2b