Merge from origin/emacs-26

Merge from origin/emacs-26

b6d78a0 (origin/emacs-26) Fix a typo in ELisp manual
c9f6f86 Prevent redrawing if frame is garbaged
00ba226 Attempt to fix hangs on MS-Windows due to C-g
b26d637 Fix Calc graph output on MS-Windows
03818b0 Fix a minor mistake in ELisp manual
6ac5985 ; Fix some trivial doc typos
21b9026 * etc/tutorials/TUTORIAL: Fix typo (bug#34049)
d223727 Fix UI of Buffer-menu
0f71655 Reinitialize ispell-really-enchant when changing the speller
9845044 Speed up loading css-mode