maintain comments when parsing

[jamiehaywood]

It would be good to maintain comments when parsing an stringifying.

I'm not entirely sure how you would implement, but perhaps you could set lines with a # to be undefined and then write them from the object back to a line with just a key and no value?

[dhlavaty]

+1 for comment support

We use envfile for generating many setup scripts and automations. It would be great, if we could add a comment to the first line of generated files. Like:

# This file was autogenerated. Do not edit by hand.
VAR=abc
...

[leemm]

I would appreciate this too.