How to handle trailing newlines?

[trestletech]

If a field has a trailing newline, it can be marshaled as a separate paragraph.

I see that in parsing you take special precautions for the case of a line that is a single space/tab followed by a period (https://github.com/paultag/go-debian/blob/master/control/parse.go#L228-L230) to treat that as an empty line. But when you marshal a property that has trailing newlines you don't currently take any special precautions.

Meaning that when I go to marshal an array of objects I can end up with:

ID: 1
Description: Description here
 and continues here.

Name: Object1

ID: 2
Description: Single-line desc
Name: Object2

which now gets improperly parsed.

Would you argue that it's the client's responsibility to prune such trailing newlines before serializing? Or would you be open to a PR that alters the serialization behavior to take advantage of that special case mention above and translate trailing newlines to include a leading whitespace and a period so that it gets rendered like so:

ID: 1
Description: Description here
 and continues here.
 .
Name: Object1

ID: 2
Description: Single-line desc
Name: Object2

I believe that could be parsed properly.

[paultag]

Ah, cool! Nice bug. Yeah, the marshal code should handle this right, if I give it the raw text of a document, it shouldn't generate something invalid. Nice catch!

[paultag]

I wonder if we can use the DotWriter from SMTP or something to help with this