diff --git a/runtime/doc/tags b/runtime/doc/tags
index bc573b7..66cc033 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -4170,13 +4170,10 @@
 E823	undo.txt	/*E823*
 E824	undo.txt	/*E824*
 E825	undo.txt	/*E825*
-E826	undo.txt	/*E826*
-E827	undo.txt	/*E827*
 E828	undo.txt	/*E828*
 E829	undo.txt	/*E829*
 E83	message.txt	/*E83*
 E830	undo.txt	/*E830*
-E831	undo.txt	/*E831*
 E84	windows.txt	/*E84*
 E85	options.txt	/*E85*
 E86	windows.txt	/*E86*
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index a53eb53..bde8146 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1097,6 +1097,7 @@
     - When there is no undo info (undolevels negative), delete the undo file.
     - 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)
 - Also crypt the undo file.
 - Also crypt the swap file, each block separately.  Change mf_write() and
     mf_read().  How to get b_p_key to these functions?
diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index c0b9d12..a7ae173 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -267,10 +267,7 @@
 	The file text differs from when the undo file was written.  This means
 	the undo file cannot be used, it would corrupt the text.  This also
 	happens when 'encoding' differs from when the undo file was written.
-*E825* *E826* *E831*
-	The undo file does not contain valid contents and cannot be used.
-*E827*	The magic number at the end of the file was not found.  This usually
-	means the file was truncated.
+*E825*  The undo file does not contain valid contents and cannot be used.
 
 Writing an undo file may fail for these reasons:
 *E828*	The file to be written cannot be created.  Perhaps you do not have
diff --git a/runtime/syntax/sed.vim b/runtime/syntax/sed.vim
index 0383b6f..42ad6d8 100644
--- a/runtime/syntax/sed.vim
+++ b/runtime/syntax/sed.vim
@@ -2,7 +2,7 @@
 " Language:	sed
 " Maintainer:	Haakon Riiser <hakonrk@fys.uio.no>
 " URL:		http://folk.uio.no/hakonrk/vim/syntax/sed.vim
-" Last Change:	2005 Dec 15
+" Last Change:	2010 May 29
 
 " For version 5.x: Clear all syntax items
 " For version 6.x: Quit when a syntax file was already loaded
@@ -49,7 +49,7 @@
 " Metacharacters: $ * . \ ^ [ ~
 " @ is used as delimiter and treated on its own below
 let __at = char2nr("@")
-let __sed_i = char2nr(" ")
+let __sed_i = char2nr(" ") " ASCII: 32, EBCDIC: 64
 if has("ebcdic")
     let __sed_last = 255
 else
@@ -105,8 +105,8 @@
     if exists("highlight_sedtabs")
 	HiLink sedTab		Todo
     endif
-    let __sed_i = 32
-    while __sed_i <= 126
+    let __sed_i = char2nr(" ") " ASCII: 32, EBCDIC: 64
+    while __sed_i <= __sed_last
 	exe "HiLink sedRegexp".__sed_i		"Macro"
 	exe "HiLink sedReplacement".__sed_i	"NONE"
 	let __sed_i = __sed_i + 1
@@ -115,7 +115,7 @@
     delcommand HiLink
 endif
 
-unlet __sed_i __sed_delimiter __sed_metacharacters
+unlet __sed_i __sed_last __sed_delimiter __sed_metacharacters
 
 let b:current_syntax = "sed"