A bit of cleanup and simplification for undofile.
diff --git a/runtime/doc/message.txt b/runtime/doc/message.txt
index 32689d8..1026815 100644
--- a/runtime/doc/message.txt
+++ b/runtime/doc/message.txt
@@ -19,7 +19,7 @@
 is especially useful when messages have been overwritten or truncated.  This
 depends on the 'shortmess' option.
 
-The number of remembered messages is fixed at 20 for the tiny version and 100
+The number of remembered messages is fixed at 20 for the tiny version and 200
 for other versions.
 
 								*g<*