Fix header of spec files
M functional/simple_spec.rb +2 -1
@@ 1,4 1,5 @@ 
-#!/usr/bin/env rspec -cfd
+# -*- ruby -*-
+# frozen_string_literal: true
 
 require_relative 'spec_helper'
 

          
M spec/pushdown/automaton_spec.rb +2 -1
@@ 1,4 1,5 @@ 
-#!/usr/bin/env rspec -cfd
+# -*- ruby -*-
+# frozen_string_literal: true
 
 require_relative '../spec_helper'
 

          
M spec/pushdown/transition/pop_spec.rb +2 -1
@@ 1,4 1,5 @@ 
-#!/usr/bin/env rspec -cfd
+# -*- ruby -*-
+# frozen_string_literal: true
 
 require_relative '../../spec_helper'
 

          
M spec/pushdown/transition/push_spec.rb +2 -1
@@ 1,4 1,5 @@ 
-#!/usr/bin/env rspec -cfd
+# -*- ruby -*-
+# frozen_string_literal: true
 
 require_relative '../../spec_helper'
 

          
M spec/pushdown/transition/replace_spec.rb +2 -1
@@ 1,4 1,5 @@ 
-#!/usr/bin/env rspec -cfd
+# -*- ruby -*-
+# frozen_string_literal: true
 
 require_relative '../../spec_helper'
 

          
M spec/pushdown/transition/switch_spec.rb +2 -1
@@ 1,4 1,5 @@ 
-#!/usr/bin/env rspec -cfd
+# -*- ruby -*-
+# frozen_string_literal: true
 
 require_relative '../../spec_helper'
 

          
M spec/pushdown/transition_spec.rb +2 -1
@@ 1,4 1,5 @@ 
-#!/usr/bin/env rspec -cfd
+# -*- ruby -*-
+# frozen_string_literal: true
 
 require_relative '../spec_helper'