Fixing `record_key_for_dom_id` documentation.

The default implementation joins everything with '_' and not with '-'

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/lib/action_controller/record_identifier.rb b/actionpack/lib/action_controller/record_identifier.rb
index c11d676c5e..2036442cfe 100644
--- a/actionpack/lib/action_controller/record_identifier.rb
+++ b/actionpack/lib/action_controller/record_identifier.rb
@@ -67,7 +67,7 @@ module ActionController
     # This can be overwritten to customize the default generated string representation if desired.
     # If you need to read back a key from a dom_id in order to query for the underlying database record,
     # you should write a helper like 'person_record_from_dom_id' that will extract the key either based
-    # on the default implementation (which just joins all key attributes with '-') or on your own
+    # on the default implementation (which just joins all key attributes with '_') or on your own
     # overwritten version of the method. By default, this implementation passes the key string through a
     # method that replaces all characters that are invalid inside DOM ids, with valid ones. You need to
     # make sure yourself that your dom ids are valid, in case you overwrite this method.