check_boxes_input doesn't respect :label_method if :collection is Array of Strings or Symbols

[jfirebaugh]

form.input :foo,
           :as           => :check_boxes,
           :collection   => [:a, :b, :c],
           :label_method => proc {|f| I18n.t(f, :scope => :foo)}

Here, the :label_method proc will never be called due to a shortcut in find_collection_for_column. Instead the labels will be "a", "b", "c". IMO, if :label_method is given explicitly it should always be used, even if an array of strings or symbols is passed as the collection.

[mjonuschat]

Fixed in commit 1420c6b

[mjonuschat]

Fixed in commit 1420c6b