错题重做来源清点修复一个出现空行的bug

工具/错题重做来源清点.py

@@ -72,6 +72,7 @@ for texfile in new_texfiles:
             output += "(%s)\t(关联题)\t%s\n"%(id,",".join(origins))
             for id1 in rel_ids:
                 results = "\n".join([(id1 + "\t" + r) for r in pro_dict[id1]["usages"] if classid in r])
+                if len(results) > 2:
                     print(results)
                     output += results + "\n"
         else: