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-rw-r--r--lib/rubygems/indexer.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rubygems/indexer.rb b/lib/rubygems/indexer.rb
index 23279f40ec..21ccf0dfbb 100644
--- a/lib/rubygems/indexer.rb
+++ b/lib/rubygems/indexer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems'
require 'rubygems/package'
require 'time'