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-rw-r--r--lib/rubygems/resolver/set.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rubygems/resolver/set.rb b/lib/rubygems/resolver/set.rb
index b26dc45c7b..e2253abf3a 100644
--- a/lib/rubygems/resolver/set.rb
+++ b/lib/rubygems/resolver/set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# Resolver sets are used to look up specifications (and their
# dependencies) used in resolution. This set is abstract.