Zettlr: Increase size lines before a line with `-` symbol

[dukebarman]

Description

Increase size of lines when start a next line with - symbol

Reproducing

Enter header, next line with text and next line with symbol

Expected behaviour

Don't increase size of lines

Screenshots

Normal size:

After enter - symbol at next line:

Platform

• OS and version: Windows 10 with last updates
• Zettlr Version: 1.7.5
• Screen Resolution: 1920x1080

Additional information

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[Kangie]

Hi @dukebarman

The reason that this behaviour occurs is that the - is considered to be a Setext style subheading (level 2 heading).

Some examples of the rendering behaviour:

Edit: Digging into it a bit further, Zettlr and Pandoc have different behaviours here.

A Setext style heading can be multiline (which Zettlr renders correctly) however Pandoc breaks with this and requires them to be on a single line. See jgm/pandoc#4110

@nathanlesage, should the Zettlr rendering behaviour match Pandoc, or is this desired behaviour (CommonMark allows it)? If so, I'll submit an issue to keep track of this.

[nathanlesage]

Zettlr strictly follows CommonMark here, as also Pandoc wants to switch more and more to CommonMark itself (so Zettlr is to some extent farther than Pandoc). So it is expected behaviour.

[dukebarman]

How can I disable it?

[nathanlesage]

Afaik you can't

[dukebarman]

It's bad =\

[nathanlesage]

It's the Markdown standard; and Zettlr follows it closely. ¯\_(ツ)_/¯

[dukebarman]

So ia writer, vscode and another editors with markdown renders this wrong?

[nathanlesage]

Yes, at least not CommonMark conforming. As Pandoc will be switching to CommonMark, and CommonMark is the de-facto standard for Markdown, we'll stick to that to reduce interoperability issues.

[dukebarman]

Make more tests - when write text after - symbol, it returns to habitual behavior. So should not to pay attention in same rare cases :)

P.S. Imho, this settext behavior will be more comfortable with --- symbols

[Kangie]

P.S. Imho, this settext behavior will be more comfortable with --- symbols

Unfortunately, the CommonMark spec says:

A setext heading underline is a sequence of = characters or a sequence of - characters, with no more than 3 spaces indentation and any number of trailing spaces.

A strict reading of the spec says that a single - character is acceptable, and that's the behaviour that Zettlr follows.
It's not ideal, but Zettlr should be able to parse any valid MarkDown document that it's presented with according to the specification, and that's what it does. Deviating from strict standards compliance is undesirable here.