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<*
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 9dc6a02..dd55ae3 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1093,9 +1093,9 @@
    Use register_shell_extension()? (George Reilly, 2010 May 26)
    Ron's version: http://dev.ronware.org/p/vim/finfo?name=gvim.nsi
 - Persistent undo bugs / fixes:
-    - check for sizeof(time_t) results in compiler warning in misc2.c
     - Memory leak reproduced by Dominique Pelle, 2010 May 28.
     - When there is no undo info (undolevels negative), delete the undo file.
+      Already done?
     - Need to check all values for evil manipulation.
     - Add undofile(name): get undo file name for buffer "name".
 - patch for unused functions. (Dominique Pelle, 2010 May 29)