Mermaidでテスト

```mermaid
quadrantChart
    title "小説の傾向"
    x-axis "暗い話" --> "明るい話"
    y-axis "空想的" --> "現実的"
    quadrant-1 "人間賛歌"
    quadrant-2 "ニヒリズム"
    quadrant-3 "恐怖"
    quadrant-4 "現実逃避"
    "鉄道員": [0.57, 0.69]
    "羊をめぐる冒険": [0.78, 0.34]
    "人間腸詰": [0.40, 0.34]
    "人間失格": [0.35, 0.78]
```

noteの新機能らしいので使ったら、めっちゃめんどい。

#Mermaid