console in opentracing-0.4.1

- old
+ new

@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 
-require "bundler/setup"
-require "opentracing"
-require "irb"
+require 'bundler/setup'
+require 'opentracing'
+require 'irb'
 IRB.start