[WWcvs] pg: Enable commas when mode=>"frac" is specified.

[dpvc v. a. <we...@ma...>]

Log Message:
-----------
Enable commas when mode=>"frac" is specified.

Modified Files:
--------------
    pg/macros:
        extraAnswerEvaluators.pl

Revision Data
-------------
Index: extraAnswerEvaluators.pl
===================================================================
RCS file: /webwork/cvs/system/pg/macros/extraAnswerEvaluators.pl,v
retrieving revision 1.5
retrieving revision 1.6
diff -Lmacros/extraAnswerEvaluators.pl -Lmacros/extraAnswerEvaluators.pl -u -r1.5 -r1.6
--- macros/extraAnswerEvaluators.pl
+++ macros/extraAnswerEvaluators.pl
@@ -682,6 +682,7 @@
           };
           /^frac$/i      and do {
             $context = Context("LimitedNumeric-Fraction")->copy;
+	    $context->operators->set(',' => {class=> 'Parser::BOP::comma'});
             last;
           };
 	if(defined($num_params{'complex'}) &&