Hi @RaptorCZ, thanks for your contribution!

I think it's not the intended behavior of Markdown. I think that "double breakline" makes a paragraph, and "single breakline" just should do nothing instead of creating a <br>.

Besides, I suppose that the usage of <br> everywhere on the HTML is not a recommended practice.

Hi,
2 spaces in markdown means "do line break". You can check documentation
https://www.markdownguide.org/basic-syntax/#line-breaks
This is standard way how to wrap line instead of creating paragraphs.

The same in commonmark specs
https://spec.commonmark.org/0.17/#hard-line-breaks

We can discuss if <br> is ok or not in html, but this is how it works :-)

Good point. You are right.

From what I read there, it only happens when the line ends with "two or more spaces" (and then the breakline) in the source. Does visit_linebreak works like that way only?

Commonmark's parser has new line detection as

    def parseNewline(self, block):
        """
        Parse a newline.  If it was preceded by two spaces, return a hard
        line break; otherwise a soft line break.
        """
        # assume we're at a \n
        self.pos += 1
        lastc = block.last_child
        if lastc and lastc.t == 'text' and lastc.literal[-1] == ' ':
            linebreak = len(lastc.literal) >= 2 and lastc.literal[-2] == ' '
            lastc.literal = re.sub(reFinalSpace, '', lastc.literal)
            if linebreak:
                node = Node('linebreak', None)
            else:
                node = Node('softbreak', None)
            block.append_child(node)
        else:
            block.append_child(Node('softbreak', None))

        # gobble leading spaces in next line
        self.match(reInitialSpace)
        return True

So it checks if it is softbreak or linebreak.

Current version of recommonmark has softbreak implemented.

    def visit_softbreak(self, _):
        self.current_node.append(nodes.Text('\n'))

So I just added implementation for missing linebreak token as specification says. Render linebreak as <br \>

    def visit_linebreak(self, _):
        self.current_node.append(nodes.raw('', '<br />', format='html'))

can be merged for new release ?
i need linebreak support