** M-TAB in most programming language modes now runs the command<BR>
complete-symbol.  This command performs completion on the symbol name
in the buffer before point.
<P>
With a numeric argument, it performs completion based on the set of
symbols documented in the Info files for the programming language that
you are using.
<P>
With no argument, it does completion based on the current tags tables,
just like the old binding of M-TAB (complete-tag).
<P>