Modify the blink(1) recipe to allow direct lookup of serial number

[coledot]

Handy for assigning a specific blink(1) to a specific task.

[perryn]

Hi @coledot

Thanks for the pull request!

A few questions/concerns

• I'm not sure how the code changes relate to the title of the pull request - all you seem to have done is move where the device is opened? Can you explain further?
• If you are going to modify tested code, please make sure you update the specs too and make sure they pass
• There are a number of changes included that just seem to be white space. This makes it difficult to read the pull request. Can you clean that up?

cheers
Perryn

[coledot]

Hi @perryn,

I modified the Light code to track both the handle and device for a given blink(1), instead of just the handle. Also, in the blink_1.rb recipe, I added a #serial_number method. This method is simply a wrapper around @device.serial_number. This allows one to say light.serial_number to get the blink(1) serial. @handle doesn't provide an equivalent method, from what I can see.

I've fixed the specs as well. The whitespace modifications are to remove excess spaces from the end of lines--just a minor cleanup/annoyance I wanted to deal with.