Update runtime files.
Add missing test files.
diff --git a/runtime/doc/usr_08.txt b/runtime/doc/usr_08.txt
index 9a92802..a9194ab 100644
--- a/runtime/doc/usr_08.txt
+++ b/runtime/doc/usr_08.txt
@@ -17,7 +17,7 @@
 |08.6|	Commands for all windows
 |08.7|	Viewing differences with vimdiff
 |08.8|	Various
-|08.9|  Tab pages
+|08.9|	Tab pages
 
      Next chapter: |usr_09.txt|  Using the GUI
  Previous chapter: |usr_07.txt|  Editing more than one file