lib/robot/commands/factory.rb in robot_rea-0.1.5 vs lib/robot/commands/factory.rb in robot_rea-0.1.6

@@ -1,11 +1,13 @@
+# frozen_string_literal: true
+
 # Factory class that takes a command input and returns the command object that can handle it,
 # this is used instead of if/else or case/when for each command.
 # If the command entered does not match any known command, the NoOp Command will be returned.
 
 module Robot
   module Commands
-    COMMANDS = [Left, Right, Move, Place, Report, NoOp]
+    COMMANDS = [Left, Right, Move, Place, Report, NoOp].freeze
 
     class Factory
       def self.build(command)
         command_klass = COMMANDS.detect { |klass| klass.matches?(command) }
         command_klass