updated for version 7.0e03
diff --git a/runtime/doc/map.txt b/runtime/doc/map.txt
index 3ed090a..506ca24 100644
--- a/runtime/doc/map.txt
+++ b/runtime/doc/map.txt
@@ -1,4 +1,4 @@
-*map.txt* For Vim version 7.0e. Last change: 2006 Apr 11
+*map.txt* For Vim version 7.0e. Last change: 2006 Apr 19
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -239,6 +239,16 @@
CTRL-L inserts the next number, CTRL-R resets the count. CTRL-R returns an
empty string, so that nothing is inserted.
+Note that there are some tricks to make special keys work and escape CSI bytes
+in the text. The |:map| command also does this, thus you must avoid that it
+is done twice. This does not work: >
+ :imap <expr> <F3> "<Char-0x611B>"
+Because the <Char- sequence is escaped for being a |:imap| argument and then
+again for using <expr>. This does work: >
+ :imap <expr> <F3> "\u611B"
+Using 0x80 as a single byte before other text does not work, it will be seen
+as a special key.
+
1.3 MAPPING AND MODES *:map-modes*