Should new lines start new paragraphs?

Spec
3

And thus it might be a good idea to provide override in the document declaration. e.g. Line_Break: On

!CommonMark: 0.1.23-github.username.projectname
 Title:      Title for the top bar of any browser
 Date:       32-4-2002
 Line_Break: On

# First Header #
A document
With linebreak because the user wants
to...

Would let people use it when needed (or perhaps always in user’s settings)