diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 19b9bc9..062da08 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -2093,7 +2093,7 @@
 		Returns an empty List or String if {fromlist} and {tolist} are
 		identical.
 
-		Examples:
+		Examples: >
 		    :echo diff(['abc'], ['xxx'])
 		     @@ -1 +1 @@
 		     -abc
@@ -2103,7 +2103,7 @@
 		     [{'from_idx': 0, 'from_count': 1, 'to_idx': 0, 'to_count': 1}]
 		    :echo diff(readfile('oldfile'), readfile('newfile'))
 		    :echo diff(getbufline(5, 1, '$'), getbufline(6, 1, '$'))
-
+<
 		For more examples, refer to |diff-func-examples|
 
 		Can also be used as a |method|: >
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 574b9c9..75ea2c7 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 9.1.  Last change: 2024 Feb 05
+*eval.txt*	For Vim version 9.1.  Last change: 2024 Feb 06
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -425,6 +425,18 @@
 modified.  The value must at least have the number of items in the range: >
 	:let list[3:5] = [3, 4, 5]
 
+To add items to a List in-place, you can use the |+=| operator: >
+	:let listA = [1, 2]
+	:let listA += [3, 4]
+<
+When two variables refer to the same List, changing one List in-place will
+cause the referenced List to be changed in-place: >
+	:let listA = [1, 2]
+	:let listB = listA
+	:let listB += [3, 4]
+	:echo listA
+	[1, 2, 3, 4]
+<
 Adding and removing items from a list is done with functions.  Here are a few
 examples: >
 	:call insert(list, 'a')		" prepend item 'a'