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-rw-r--r--ext/ripper/lib/ripper/filter.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/ripper/lib/ripper/filter.rb b/ext/ripper/lib/ripper/filter.rb
index 239f9f0..a50a2c6 100644
--- a/ext/ripper/lib/ripper/filter.rb
+++ b/ext/ripper/lib/ripper/filter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# $Id$
#