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-rw-r--r--lib/rdoc/attr.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rdoc/attr.rb b/lib/rdoc/attr.rb
index 960e1d1107..f77a5c04a7 100644
--- a/lib/rdoc/attr.rb
+++ b/lib/rdoc/attr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# An attribute created by \#attr, \#attr_reader, \#attr_writer or
# \#attr_accessor