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-rw-r--r--lib/rdoc/parser/rd.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rdoc/parser/rd.rb b/lib/rdoc/parser/rd.rb
index 09069ae297..e6693b9ac8 100644
--- a/lib/rdoc/parser/rd.rb
+++ b/lib/rdoc/parser/rd.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# Parse a RD format file. The parsed RDoc::Markup::Document is attached as a
# file comment.