Update runtime files. Convert a couple of help files to utf-8.
diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
index 678fb37..25c5e0f 100644
--- a/runtime/doc/autocmd.txt
+++ b/runtime/doc/autocmd.txt
@@ -1,4 +1,4 @@
-*autocmd.txt*   For Vim version 8.0.  Last change: 2018 Mar 05
+*autocmd.txt*   For Vim version 8.0.  Last change: 2018 Mar 15
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -56,6 +56,8 @@
 			Add {cmd} to the list of commands that Vim will
 			execute automatically on {event} for a file matching
 			{pat} |autocmd-patterns|.
+			Note: A quote character is seen as argument to the
+			:autocmd and won't start a comment.
 			Vim always adds the {cmd} after existing autocommands,
 			so that the autocommands execute in the order in which
 			they were given.  See |autocmd-nested| for [nested].
@@ -91,7 +93,8 @@
 that you can easily clear them: >
 
 	augroup vimrc
-	  autocmd!	" Remove all vimrc autocommands
+	  " Remove all vimrc autocommands
+	  autocmd!
 	  au BufNewFile,BufRead *.html so <sfile>:h/html.vim
 	augroup END
 
@@ -145,6 +148,8 @@
 			plugins, syntax highlighting, etc.
 
 :au[tocmd]! [group]	Remove ALL autocommands.
+			Note: a quote will be seen as argument to the :autocmd
+			and won't start a comment.
 			Warning: You should normally not do this without a
 			group, it breaks plugins, syntax highlighting, etc.
 
@@ -329,10 +334,6 @@
 |CmdlineEnter|		after the cursor moves to the command line
 |CmdlineLeave|		before the cursor leaves the command line
 
-|CmdlineChanged|	after a change was made to the command-line text
-|CmdlineEnter|		after the cursor moves to the command line
-|CmdlineLeave|		before the cursor leaves the command line
-
 |InsertEnter|		starting Insert mode
 |InsertChange|		when typing <Insert> while in Insert or Replace mode
 |InsertLeave|		when leaving Insert mode