Font awesome not working anymore in link texts

[giovdi]

Describe the bug
Font awesome glyphs are not shown anymore in link texts

I'm using the min.js script and the current config is:

<script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
<script>
	var config = {
		startOnLoad: true,
		flowchart: {
			diagramPadding: 0,
		},
	};
	mermaid.initialize(config);
</script>

but the issue seems not related to a specific platform.

To Reproduce
Use the following schema in the live editor:

graph LR
  A-->|"fa:fa-envelope"| B

Live editor: link

Expected behavior
The envelope icon in the link

Desktop

• OS: Win10
• Browser: Chrome
• Version: 85.0.4183.121

Additional context
Related bug #546

[knsv]

Very odd, I cant find any traces of this for edge labels, only for vertices. I have added it (again?) for labels.

In flowchart it works already though.

flowchart LR
  A-->|"fa:fa-envelope"| B

After next release it will be available in graph also.

(Also adding a rendering test for this so that if it breaks in the future, it will be noticed...)