updated for version 7.2c-001
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index ffe5ea9..8bb990a 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -2681,7 +2681,11 @@
Examples: >
:echo sort(extend(mylist, [7, 5]))
:call extend(mylist, [2, 3], 1)
-< Use |add()| to concatenate one item to a list. To concatenate
+< When {expr1} is the same List as {expr2} then the number of
+ items copied is equal to the original length of the List.
+ E.g., when {expr3} is 1 you get N new copies of the first item
+ (where N is the original length of the List).
+ Use |add()| to concatenate one item to a list. To concatenate
two lists into a new list use the + operator: >
:let newlist = [1, 2, 3] + [4, 5]
<