简化合并

markdown.js

@@ -111,13 +111,10 @@ element.onclick = (event) => {
         return { index: i, rect: range.getBoundingClientRect() }
     })
 
-    const closest = positions.reduce(
-        (closest, pos) => {
-            const dist = Math.abs(x - pos.rect.left)
-            return dist < closest.distance ? { ...pos, distance: dist } : closest
-        },
-        { index: -1, distance: Infinity }
-    )
+    const closest = positions.reduce((closest, pos) => {
+        const dist = Math.abs(x - pos.rect.left)
+        return dist < closest.distance ? { ...pos, distance: dist } : closest
+    }, { index: -1, distance: Infinity })
 
     const rect = closest.rect
     const insertBefore = x < rect.left + rect.width / 2