method #close doesn't exists for File class

[hoblin]

artoo/lib/artoo/adaptors/io/digital_pin.rb

Line 17 in e5e67f6

File.close

When you open file in Ruby using File.open with block, file closes automatically.

File.open(...){ |f| f << something }

You need to close file only if you use open without block. It this case open is just synonym for new

f = File.open(...)
f << something
f.close