Description

The following produces a diagram with no arrows from a to b.

flowchart TD
    a -- edge --- b

For example, as of the reporting of this bug, GitHub still uses an older version of Mermaid that seems to render no arrows:

flowchart TD
    a -- edge --- b

In v11, there's an arrow from a to b. Example: https://mermaid.live/edit#pako:eNolyksKAyEQBNCrSK3HC7ieGyRLNx1tdcBPMC0hDHP3dEhtqgreiTAiwyHV8Q6Fppj77rvRkLHWcMysbc0DGxrPRkdUff6IhxRu7OF0Rk60qnj4fimlJeP26QFO5uINc6xc4BLVl771jCS8H5QntT-5vqJxLPo

The documentation seems to imply there's still support for an "open link", whose example now looks exactly like "link with arrow head": https://mermaid.js.org/syntax/flowchart.html#links-between-nodes

As a side note (and perhaps a separate bug?): the curve property seems to have no effect when using the elk layout.

Steps to reproduce

Render the following diagram with v10 and v11 and compare the results:

flowchart TD
    a -- edge --- b

Screenshots

No response

Code Sample

flowchart TD
    a -- edge --- b

Setup

• Mermaid version: v10 and v11
• Browser and Version: any

Suggested Solutions

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Additional Context

No response