fix: fix errors and reformat code

src/plugins/remark-excerpt.js

@@ -2,15 +2,15 @@ import { toString } from 'mdast-util-to-string'
 
 /* Use the post's first paragraph as the excerpt */
 export function remarkExcerpt() {
-    return (tree, { data }) => {
-        let excerpt = '';
-        for (let node of tree.children) {
-            if (node.type !== 'paragraph') {
-                continue
-            }
-            excerpt = toString(node)
-            break
-        }
-        data.astro.frontmatter.excerpt = excerpt
-    };
-}
+  return (tree, { data }) => {
+    let excerpt = ''
+    for (let node of tree.children) {
+      if (node.type !== 'paragraph') {
+        continue
+      }
+      excerpt = toString(node)
+      break
+    }
+    data.astro.frontmatter.excerpt = excerpt
+  }
+}