Rename font-log-refontify

* lisp/font-lock.el (font-lock-debug-fontify): Rename to make it
clearer what the function is for.
* doc/lispref/modes.texi (Font Lock Basics): Ditto.
1 job for master in 58 minutes and 31 seconds (queued for 1 second)
Status Job ID Name Coverage
failed #4192


Name Stage Failure
test-all Test
Makefile:319: recipe for target 'check-doit' failed
make[2]: Leaving directory '/builds/emacs/emacs/test'
make[2]: *** [check-doit] Error 1
Makefile:294: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
make: *** [check-expensive] Error 2
Makefile:959: recipe for target 'check-expensive' failed
ERROR: Job failed: exit code 1