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-rw-r--r--actionpack/lib/action_view/helpers/tags/select.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/helpers/tags/select.rb b/actionpack/lib/action_view/helpers/tags/select.rb
index 4d94ee2c23..53a108b7e6 100644
--- a/actionpack/lib/action_view/helpers/tags/select.rb
+++ b/actionpack/lib/action_view/helpers/tags/select.rb
@@ -31,6 +31,7 @@ module ActionView
#
# [nil, []]
# { nil => [] }
+ #
def grouped_choices?
!@choices.empty? && @choices.first.respond_to?(:last) && Array === @choices.first.last
end