Update runtime files.
diff --git a/runtime/tutor/tutor.zh.big5 b/runtime/tutor/tutor.zh.big5
index 9da8b1a..710926a 100644
--- a/runtime/tutor/tutor.zh.big5
+++ b/runtime/tutor/tutor.zh.big5
@@ -35,7 +35,7 @@
 
 ---> ²{¦b±zÀ³¸Ó¤w¸g¾Ç·|¦p¦ó²¾°Ê¨ì¤U¤@Á¿§a¡C
 
-  3. ²{¦b½Ð¨Ï¥Î¤U¦æÁä¡A±N¥ú¼Ð²¾°Ê¨ì²Ä¤GÁ¿¡C
+  3. ²{¦b½Ð¨Ï¥Î¤U¦æÁä¡A±N¥ú¼Ð²¾°Ê¨ì²Ä¤@Á¿²Ä¤G¸`¡C
 
 ´£¥Ü¡J¦pªG±z¤£´±½T©w±z©Ò«ö¤Uªº¦r¥À¡A½Ð«ö¤U<ESC>Áä¦^¨ì¥¿±`(Normal)¼Ò¦¡¡C
       µM«á¦A¦¸±qÁä½L¿é¤J±z·Q­nªº©R¥O¡C