fix the linting error

869fc05d · micael.bergeron · 71b2cc1d · 869fc05d
Commit 869fc05d authored Nov 16, 2017 by micael.bergeron
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app/models/system_note_metadata.rb app/models/system_note_metadata.rb +1 -1

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--- 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