label.rb in ffi-tk-2018.02.20

- old
+ new

@@ -1,5 +1,6 @@
+# frozen_string_literal: true
 require_relative '../../helper'
 
 describe Tk::Tile::Label do
   it 'initializes' do
     instance = Tk::Tile::Label.new
@@ -7,11 +8,10 @@
     instance.tk_parent.should == Tk.root
   end
 
   it 'assigns a value' do
     label = Tk::Tile::Label.new
-    label.value.should == nil
+    label.value.should.nil?
     label.value = 'Hello, World!'
     label.value.should == 'Hello, World!'
   end
 end
-