bug#6343: Log-edit font lock changes lead to loop

[Chong Yidong]

I had the following text in my kill ring:

  * cedet/semantic/lex-spp.el
  (semantic-lex-spp-table-write-slot-value): Instead of erroring on
  invalid values during save, just save a nil (Bug#6324).

>From VC-dir, I marked some files and typed "v" to commit them.  In the
log edit buffer, I type "C-y" to attempt to yank into the buffer.  Emacs
became unresponsive to all keyboard input.  According to the debugger,
Emacs is looping on `jit-lock-fontify-now'.


If I revert the following change, the problem goes away.

22010-06-02  Dan Nicolaescu  <dann@ics.uci.edu>

  * log-edit.el (log-edit-font-lock-keywords): Make group 4 match lax.

This is on an up-to-date trunk build:

GNU Emacs 24.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.20.1)
 of 2010-06-03 on furry