gcc/ChangeLog:
* doc/md.texi: Fix incorrect pxref.
2. The second alternative has @samp{d} (data register) for operand 0,
@samp{0} for operand 1, and @samp{dmKs} for operand 2. The @samp{=} and
@samp{%} in the constraints apply to all the alternatives; their
-meaning is explained in the next section (@pxref{Class Preferences}).
+meaning is explained in a later section (@pxref{Modifiers}).
If all the operands fit any one alternative, the instruction is valid.
Otherwise, for each alternative, the compiler counts how many instructions