bug#40805: 27.0.91; fringe bitmap values for ? and ! do not match comment in fringe.c

[Trevor Spiteri]

In src/fringe.c, the question-mark bitmap shown in the comments would
result in the code:

static unsigned short question_mark_bits[] = {
   0x3c, 0x7e, 0xc3, 0xc3, 0x0c, 0x18, 0x18, 0x00, 0x18, 0x18};

and the exclamation-mark bitmap in the code:

static unsigned short exclamation_mark_bits[] = {
   0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00, 0x18, 0x18};

I'm guessing they are different by mistake, but they aren't really used
so the error went undetected.

In GNU Emacs 27.0.91 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.13, cairo version 1.16.0)
of 2020-04-23 built on desktop
Repository revision: ba6104d1e8db4e8db2f12acaebf092ef579c6632
Repository branch: emacs-27