commit: Honor "abort" option

Fixes #73

bin/commit

@@ -621,6 +621,9 @@ for base, ns, items in sorted(all_exams,key=lambda i:i[1].lectures):
 
       if reiterate:
         continue
+      if not execute:
+        exam_processed=True
+        continue
 
       
       if print_count>0: