Update runtime files.
diff --git a/runtime/tutor/tutor.utf-8 b/runtime/tutor/tutor.utf-8
index c076e3b..426fb57 100644
--- a/runtime/tutor/tutor.utf-8
+++ b/runtime/tutor/tutor.utf-8
@@ -99,7 +99,7 @@
1. Move the cursor to the first line below marked --->.
2. To make the first line the same as the second, move the cursor on top
- of the first character AFTER where the text is to be inserted.
+ of the character BEFORE which the text is to be inserted.
3. Press i and type in the necessary additions.