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-rw-r--r--lib/rubygems/source.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rubygems/source.rb b/lib/rubygems/source.rb
index e5995f005f..7a58a441d2 100644
--- a/lib/rubygems/source.rb
+++ b/lib/rubygems/source.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'uri'
require 'fileutils'