bin/tumble in rocktumbler-0.1.2 vs bin/tumble in rocktumbler-0.1.3

@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 # Exit cleanly from an early interrupt
-Signal.trap("INT") { exit 1 }
+Signal.trap('INT') { exit 1 }
 
 require 'rocktumbler'
 Rocktumbler::Tumbler.new.tumble