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-rw-r--r--lib/rubygems/ext/configure_builder.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rubygems/ext/configure_builder.rb b/lib/rubygems/ext/configure_builder.rb
index f66e39387a..b732cada57 100644
--- a/lib/rubygems/ext/configure_builder.rb
+++ b/lib/rubygems/ext/configure_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.