Update runtime files.
diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index b1c6fa7..fabee45 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -1,4 +1,4 @@
-*undo.txt* For Vim version 8.2. Last change: 2020 Oct 18
+*undo.txt* For Vim version 8.2. Last change: 2020 Nov 30
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -65,9 +65,9 @@
the redo will not be possible anymore.
'u' included, the Vi-compatible way:
-The undo command undoes the previous change, and also the previous undo command.
-The redo command repeats the previous undo command. It does NOT repeat a
-change command, use "." for that.
+The undo command undoes the previous change, and also the previous undo
+command. The redo command repeats the previous undo command. It does NOT
+repeat a change command, use "." for that.
Examples Vim way Vi-compatible way ~
"uu" two times undo no-op
@@ -103,7 +103,7 @@
:undojoin | delete
-After this an "u" command will undo the delete command and the previous
+After this a "u" command will undo the delete command and the previous
change.
To do the opposite, break a change into two undo blocks, in Insert mode use