diff --git a/actionview/lib/action_view/helpers/text_helper.rb b/actionview/lib/action_view/helpers/text_helper.rb
index 9943e19714dffceff2bd65dbf5bb0293e86ac5c0..7cfbca5b6f8c1402c6a5a785ec4731ae7d1df2b6 100644
--- a/actionview/lib/action_view/helpers/text_helper.rb
+++ b/actionview/lib/action_view/helpers/text_helper.rb
@@ -82,6 +82,9 @@ def safe_concat(string)
       #   # => "And they f... (continued)"
       #
       #   truncate("<p>Once upon a time in a world far far away</p>")
+      #   # => "&lt;p&gt;Once upon a time in a wo..."
+      #
+      #   truncate("<p>Once upon a time in a world far far away</p>", escape: false)
       #   # => "<p>Once upon a time in a wo..."
       #
       #   truncate("Once upon a time in a world far far away") { link_to "Continue", "#" }