bytesize on nil

[ondra-m]

I have error NoMethodError: undefined method bytesize for nil:NilClass on

  cmd = TTY::Command.new
  cmd.run "wget http://ftp.ruby-lang.org/pub/ruby/2.3/ruby-2.3.0.tar.gz"

Problem is that value[offset..-1] return nil. Offsett is equal to value size.

[coveralls]

Coverage increased (+0.2%) to 91.925% when pulling fd4bf20 on ondra-m:bytesize-on-nil into a3b9e24 on piotrmurach:master.

[piotrmurach]

Hi Ondrej, thanks for fixing the bug, would you mind creating a test case to trap this problem in truncator_spec?

[coveralls]

Coverage increased (+0.2%) to 91.925% when pulling 9eed29c on ondra-m:bytesize-on-nil into a3b9e24 on piotrmurach:master.

[ondra-m]

I think this is just workaround. Would not it be better to

1. Use .byteslice instead of .[]
2. Or use .[] but without .bytesize (just .size)

[piotrmurach]

Thanks for providing test case and suggestions for fixing the issue, much appreciated!

Decided to go with the first option and released v0.2.0. Enjoy!