vim-patch:8.0.0714: when a timer causes a command line redraw " goes missing
Problem: When a timer causes a command line redraw the " that is displayed
for CTRL-R goes missing.
Solution: Remember an extra character to display.
a92522fbf3
vim-patch:8.0.0720: unfinished mapping not displayed when running timer
Problem: Unfinished mapping not displayed when running timer.
Solution: Also use the extra_char while waiting for a mapping and digraph.
(closesvim/vim#1844)
6a77d2667eclose#9835