updated for version 7.3.423
Problem: Small mistakes in comments, proto and indent.
Solution: Fix the mistakes.
Also update runtime files
diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index e9ed1b2..b165237 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -1,4 +1,4 @@
-*undo.txt* For Vim version 7.3. Last change: 2011 Aug 02
+*undo.txt* For Vim version 7.3. Last change: 2012 Jan 28
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -267,7 +267,12 @@
(the magic number at the start of the file is wrong), then
this fails, unless the ! was added.
If it exists and does look like an undo file it is
- overwritten.
+ overwritten. If there is no undo-history, nothing will be
+ written.
+ Implementation detail: Overwriting happens by first deleting
+ the existing file and then creating a new file with the same
+ name. So it is not possible to overwrite an existing undofile
+ in a write-protected directory.
{not in Vi}
:rundo {file} Read undo history from {file}.