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-rw-r--r--app/models/system_note_metadata.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/app/models/system_note_metadata.rb b/app/models/system_note_metadata.rb
index 4065c1594c3..ca0673080af 100644
--- a/app/models/system_note_metadata.rb
+++ b/app/models/system_note_metadata.rb
@@ -7,7 +7,7 @@ class SystemNoteMetadata < ActiveRecord::Base
TYPES_WITH_CROSS_REFERENCES = %w[
cross_reference
milestone
- ]
+ ].freeze
ICON_TYPES = %w[
commit description merge confidential visible label assignee cross_reference