extend.texi (__builtin_object_size): Use @pxref instead of @xref inside parenthesis.

extend.texi (__builtin_object_size): Use @pxref instead of @xref inside parenthesis.

	* doc/extend.texi (__builtin_object_size):
	Use @pxref instead of @xref inside parenthesis.
	(__builtin_has_attribute): Add missing comma after @xref.
	(__builtin_object_size): Ditto.
	* doc/md.texi (cond_*{mode}): Use @samp instead of @var around op1[i].
	* fortran/invoke.texi (-ffpe-trap): Use @var for every item
	in the list.

From-SVN: r269219