doc: Use @ref, not @xref, in the middle of a sentence

makeinfo warns about this.


	* doc/md.texi (Patterns): Use @ref instead of @xref in the middle of
	a sentence.

From-SVN: r263633

gcc/ChangeLog

+2018-08-17  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* doc/md.texi (Patterns): Use @ref instead of @xref in the middle of
+	a sentence.
+
 2018-08-17  Sandra Loosemore  <sandra@codesourcery.com>
 
 	C-SKY port: Documentation

gcc/doc/md.texi

@@ -144,7 +144,7 @@ a nameless pattern for all other purposes.  Names beginning with the
 
 The name may also have the form @samp{@@@var{n}}.  This has the same
 effect as a name @samp{@var{n}}, but in addition tells the compiler to
-generate further helper functions; see @xref{Parameterized Names} for details.
+generate further helper functions; see @ref{Parameterized Names} for details.
 
 @item
 The @dfn{RTL template}: This is a vector of incomplete RTL expressions