** When you visit a file that changes frequently outside Emacs--for<BR>
example, a log of output from a process that continues to run--it may
be useful for Emacs to revert the file without querying you whenever
you visit the file afresh with C-x C-f.
<P>
You can request this behavior for certain files by setting the
variable revert-without-query to a list of regular expressions.  If a
file's name matches any of these regular expressions, find-file and
revert-buffer revert the buffer without asking for permission--but
only if you have not edited the buffer text yourself.
<P>