lib/coltrane/chord_substitutions.rb in coltrane-1.2.4 vs lib/coltrane/chord_substitutions.rb in coltrane-2.0.0

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 module Coltrane
   module ChordSubstitutions
     def tritone_substitution
       self + Interval.augmented_fourth
     end
   end
-end
\ No newline at end of file
+end