1 files changed, 2 insertions, 2 deletions
diff --git a/app/models/principal.rb b/app/models/principal.rb
index 1d9c288cb..6e77cd866 100644
--- a/app/models/principal.rb
+++ b/app/models/principal.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 
 # Redmine - project management software
 # Copyright (C) 2006-2017  Jean-Philippe Lang
@@ -71,7 +71,7 @@ class Principal < ActiveRecord::Base
       where({})
     else
       pattern = "%#{q}%"
-      sql = "LOWER(#{table_name}.login) LIKE LOWER(:p)"
+      sql = +"LOWER(#{table_name}.login) LIKE LOWER(:p)"
       sql << " OR #{table_name}.id IN (SELECT user_id FROM #{EmailAddress.table_name} WHERE LOWER(address) LIKE LOWER(:p))"
       params = {:p => pattern}