Updated runtime files.
diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index 924e8a4..030f0de 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -1,4 +1,4 @@
-*insert.txt* For Vim version 7.3. Last change: 2012 Jan 26
+*insert.txt* For Vim version 7.3. Last change: 2012 Apr 05
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -398,7 +398,12 @@
This redefines the backspace key to start a new undo sequence. You can now
undo the effect of the backspace key, without changing what you typed before
-that, with CTRL-O u.
+that, with CTRL-O u. Another example: >
+
+ :inoremap <CR> <C-]><C-G>u<CR>
+
+This breaks undo at each line break. It also expands abbreviations before
+this.
Using CTRL-O splits undo: the text typed before and after it is undone
separately. If you want to avoid this (e.g., in a mapping) you might be able