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<*