Fix user link using @ not working at the end of line (#34894).

Patch by Marius BALTEANU.


git-svn-id: http://svn.redmine.org/redmine/trunk@20936 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -1283,7 +1283,7 @@ module ApplicationHelper
               )|
               (
               (?<sep4>@)
-              (?<identifier3>[A-Za-z0-9_\-@\.]*)
+              (?<identifier3>[A-Za-z0-9_\-@\.]*?)
               )
             )
             (?=

test/helpers/application_helper_test.rb

@@ -521,6 +521,7 @@ class ApplicationHelperTest < Redmine::HelperTest
       'user:JSMITH'                 => link_to_user(User.find_by_id(2)),
       'user#2'                      => link_to_user(User.find_by_id(2)),
       '@jsmith'                     => link_to_user(User.find_by_id(2)),
+      '@jsmith.'                    => "#{link_to_user(User.find_by_id(2))}.",
       '@JSMITH'                     => link_to_user(User.find_by_id(2)),
       '@abcd@example.com'           => link_to_user(User.find_by_id(u_email_id)),
       'user:abcd@example.com'       => link_to_user(User.find_by_id(u_email_id)),