** C-x C-w, which saves the buffer into a specified file name,<BR>
now changes the major mode according to that file name.
However, the mode will not be changed if
(1) a local variables list or the `-*-' line specifies a major mode, or
(2) the current major mode is a "special" mode,
    not suitable for ordinary files, or
(3) the new file name does not particularly specify any mode.
<P>
This applies to M-x set-visited-file-name as well.
<P>
However, if you set change-major-mode-with-file-name to nil, then
these commands do not change the major mode.
<P>