Add "frozen_string_literal: false" for all files (#26561).

This will be changed to true in the future.


git-svn-id: http://svn.redmine.org/redmine/trunk@17947 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/071_add_queries_column_names.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: false
+
 class AddQueriesColumnNames < ActiveRecord::Migration[4.2]
   def self.up
     add_column :queries, :column_names, :text