Mermaid: Graph with backslashes (\) gets rendering error

[KSR-Yasuda]

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Bug

Body

Mermaid graph with backslashes (\) fails due to the error Unsupported markdown: escape.

flowchart LR

NodeSS[/" Node [/ /] "/]
NodeBB[\" Node [\\ \\] "\]
NodeSB[/" Node [/ \\] "\]
NodeBS[\" Node [\ /] "/]
Node["Node [\a] "]

Loading

flowchart LR

NodeSS[/" Node [/ /] "/]
NodeBB[\" Node [\\ \\] "\]
NodeSB[/" Node [/ \\] "\]
NodeBS[\" Node [\ /] "/]
Node["Node [\a] "]

• Mermaid Live Editor

Found it in writing this pull request.

As the live editor is working with the code, it is in valid Mermaid syntax, I suppose.

The errors looks happening for \\ in the node labels.

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