--- loncom/homework/response.pm	2007/08/10 21:27:56	1.175
+++ loncom/homework/response.pm	2007/09/25 20:18:56	1.177
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.175 2007/08/10 21:27:56 albertel Exp $
+# $Id: response.pm,v 1.177 2007/09/25 20:18:56 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -569,7 +569,7 @@ sub implicit_multiplication {
     $expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
 # Fill in multiplication signs
 # a b -> a*b;3 b -> 3*b;3 4 -> 3*4
-    $expr=~s/([A-Za-z0-9])\s+(?=[A-Za-z0-9])/$1\*/gs;
+    $expression=~s/([A-Za-z0-9])\s+(?=[A-Za-z0-9])/$1\*/gs;
 # )( -> )*(; ) ( -> )*(
     $expression=~s/\)\s*\(/\)\*\(/gs;
 # 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
@@ -1206,6 +1206,21 @@ sub check_status {
     return 2;
 }
 
+=pod
+
+=item setup_prior_tries_hash($func,$data)
+
+  Foreach each past .submission $func is called with 3 arguments
+     - the mode to set things up for (currently always 'grade')
+     - the stored .submission string
+     - The expansion of $data
+
+  $data is an array ref containing elements that are either
+    - scalars that are other elements of the history hash to pass to $func
+    - ref to data to be passed untouched to $func
+
+=cut
+
 sub setup_prior_tries_hash {
     my ($func,$data) = @_;
     my $part = $Apache::inputtags::part;