Update runtime files
diff --git a/runtime/tutor/tutor.utf-8 b/runtime/tutor/tutor.utf-8
index 426fb57..3add4f6 100644
--- a/runtime/tutor/tutor.utf-8
+++ b/runtime/tutor/tutor.utf-8
@@ -7,7 +7,7 @@
      enough of the commands that you will be able to easily use Vim as
      an all-purpose editor.
 
-     The approximate time required to complete the tutor is 25-30 minutes,
+     The approximate time required to complete the tutor is 30 minutes,
      depending upon how much time is spent with experimentation.
 
      ATTENTION: