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-rw-r--r--activesupport/lib/active_support/core_ext/array/conversions.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/conversions.rb b/activesupport/lib/active_support/core_ext/array/conversions.rb
index d80df21e7d..c5cc31abc5 100644
--- a/activesupport/lib/active_support/core_ext/array/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/array/conversions.rb
@@ -32,7 +32,7 @@ class Array
# ['one', 'two', 'three'].to_sentence # => "one, two, and three"
#
# ['one', 'two'].to_sentence(passing: 'invalid option')
- # # => ArgumentError: Unknown key :passing
+ # # => ArgumentError: Unknown key: :passing. Valid keys are: :words_connector, :two_words_connector, :last_word_connector, :locale
#
# ['one', 'two'].to_sentence(two_words_connector: '-')
# # => "one-two"