bin/gemdiff in gemdiff-3.1.0 vs bin/gemdiff in gemdiff-4.0.0

@@ -1,8 +1,8 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
-$LOAD_PATH.unshift File.dirname(__FILE__) + "/../lib"
+$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/../lib"
 
 # Exit cleanly from an early interrupt
 Signal.trap("INT") { exit 1 }
 
 require "gemdiff"