lib/head_music/instrument.rb in head_music-0.17.0 vs lib/head_music/instrument.rb in head_music-0.18.0

@@ -1,19 +1,22 @@
+# frozen_string_literal: true
+
+# An instrument can be assigned to a staff.
 class HeadMusic::Instrument
   include HeadMusic::NamedRudiment
 
   INSTRUMENTS = {
     violin: {
-      name: "violin",
+      name: 'violin',
       family: :string,
-      default_clef: :treble
+      default_clef: :treble,
     },
     piano: {
-      name: "piano",
+      name: 'piano',
       family: :string,
-      default_system: [:treble, :bass]
-    }
-  }
+      default_system: %i[treble bass],
+    },
+  }.freeze
 
   def self.get(name)
     get_by_name(name)
   end