Fix woman.el to not confuse scan-sexps

* lisp/woman.el (woman-unpadded-space-char):
Escape the close-bracket (Bug#33940).
1 job for master in 23 minutes and 49 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #431
test

00:23:49

 
Name Stage Failure
failed
test Test
Makefile:309: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:279: recipe for target 'check' failed
make[1]: *** [check] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:955: recipe for target 'check' failed
make: *** [check] Error 2
ERROR: Job failed: exit code 1