--- loncom/homework/grades.pm	2020/05/08 14:56:53	1.768
+++ loncom/homework/grades.pm	2020/05/08 15:12:34	1.769
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.768 2020/05/08 14:56:53 raeburn Exp $
+# $Id: grades.pm,v 1.769 2020/05/08 15:12:34 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -5310,11 +5310,11 @@ sub displaySubByDates {
             }
             my @matchKey;
             if ($isTask) {
-                @matchKey = sort(grep /^resource\.\d+\.\Q$partid\E\.award$/,@versionKeys);
+                @matchKey = sort(grep(/^resource\.\d+\.\Q$partid\E\.award$/,@versionKeys));
             } elsif ($is_tool) {
-                @matchKey = sort(grep /^resource\.\Q$partid\E\.awarded$/,@versionKeys);
+                @matchKey = sort(grep(/^resource\.\Q$partid\E\.awarded$/,@versionKeys));
             } else {
-                @matchKey = sort(grep /^resource\.\Q$partid\E\..*?\.submission$/,@versionKeys);
+                @matchKey = sort(grep(/^resource\.\Q$partid\E\..*?\.submission$/,@versionKeys));
             }
 #	    next if ($$record{"$version:resource.$partid.solved"} eq '');
 	    my $display_part=&get_display_part($partid,$symb);