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-rw-r--r--lib/rdoc/token_stream.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rdoc/token_stream.rb b/lib/rdoc/token_stream.rb
index b46b7da2f7..b0035227fa 100644
--- a/lib/rdoc/token_stream.rb
+++ b/lib/rdoc/token_stream.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# A TokenStream is a list of tokens, gathered during the parse of some entity
# (say a method). Entities populate these streams by being registered with the