Strip the characters Mermaid v11's quadrantChart lexer rejects from a quadrant-N <label> line: (, ), and :. Mermaid accepts other punctuation (— · / etc.) so the human-readable meaning survives — a colon-separated label like
quadrant-1 Critical: High priority, high risk
becomes
quadrant-1 Critical High priority, high risk
which still renders correctly inside the chart cell.
Strip the characters Mermaid v11's quadrantChart lexer rejects from a
quadrant-N <label>line:(,), and:. Mermaid accepts other punctuation (— · / etc.) so the human-readable meaning survives — a colon-separated label likebecomes
which still renders correctly inside the chart cell.