Fix: course cannot be displayed after changing the teacher (#59)

* Fixe:course cannot be displayed after changing the teacher

Fixe: course cannot be displayed after just changing the teacher

* remove invalid sources

remove invalid sources

* Revert "remove invalid sources"

This reverts commit dfc9f37.

Author: wirsbf

lib/repository/xidian_ids/classtable_session.dart

@@ -549,7 +549,8 @@ class ClassTableFile extends EhallSession {
               f.classCode == e.classCode &&
               listEquals(f.originalClassRange, e.newClassRange) &&
               listEquals(f.originalAffectedWeeksList, e.newAffectedWeeksList) &&
-              f.originalWeek == e.newWeek) {
+              f.originalWeek == e.newWeek &&
+              f.originalTeacherData == e.newTeacherData) {
             flag = true;
             toRemove = f;
             break;