Fix metadata

Author: wooorm

package.json

@@ -1,7 +1,7 @@
 {
   "name": "hast-util-excerpt",
   "version": "0.0.0",
-  "description": "hast utility to excerpt the tree to a certain number of characters",
+  "description": "hast utility to excerpt the tree to a comment",
   "license": "MIT",
   "keywords": [
     "unist",

readme.md

@@ -8,7 +8,7 @@
 [![Backers][backers-badge]][collective]
 [![Chat][chat-badge]][chat]
 
-**[hast][]** utility to excerpt the tree to a certain number of characters.
+**[hast][]** utility to truncate the tree to a comment.
 
 ## Install
 
@@ -72,7 +72,7 @@ There is no default export.
 
 ### `excerpt(tree, options?)`
 
-Excerpt the tree to a certain number of characters.
+Truncate the tree to a comment.
 
 ###### `options.comment`
 
@@ -93,7 +93,7 @@ These are not counted towards `size`.
 
 ###### Returns
 
-`Node` — Truncated copy of `tree`
+`Node?` — Truncated copy of `tree` if there’s a comment, `undefined` otherwise.
 
 ## Security