测试流程图和数学公式

1. 测试单行数学公式显示效果

2. 测试多行公式显示效果

3. 测试流程图显示效果

sequenceDiagram
  participant Alice
  participant Bob
  Alice->>John: Hello John, how are you?
  loop Healthcheck
    John->>John: Fight against hypochondria
  end
  Note right of John: Rational thoughts 
prevail!
  John-->>Alice: Great!
  John->>Bob: How about you?
  Bob-->>John: Jolly good!