Added a parameter to add more control of comment offset

[rjk9w5]

I wanted this for generating config files that users would interact with on a regular basis. This makes it a little easier to look at as a user. The existing tests still work.

[rjk9w5]

I added this for my own purposes but figured I would share it because sharing is caring. Super simple change that shouldn't effect any existing code.

Old:

yaml: 
  language: cpp # the language field
  xdcx: 23423 # Some cryptic field name description 
              # that clears this up

New:

yaml: 
  language: cpp     # the language field
  xdcx: 23423       # Some cryptic field name description 
                    # that clears this up