(\opnr, \clnr): Increment/decrement \parencount, for

(\opnr, \clnr): Increment/decrement \parencount, for

(\opnr, \clnr): Increment/decrement \parencount, for
	* texinfo.tex (\opnr, \clnr): Increment/decrement \parencount, for
   	  @defun lines with nested parens.  From Bill Schelter
 	  <wfs@fireant.ma.utexas.edu>.
	(\itemizeitem): Correct \errmessage.

From-SVN: r14113