docs: Add missing comma in CUSTOM_RULES.md (typescript-eslint#4464)

zaicevas · JoshuaKGoldberg · Josh Goldberg · lonyele · commit 1c87eeaf37a7 · 2022-02-12T19:02:56.000+09:00
* Add missing comma in docs

* chore: ran Prettier

Co-authored-by: Josh Goldberg &lt;me@joshuakgoldberg.com&gt;
Co-authored-by: Josh Goldberg &lt;joshuakgoldberg@outlook.com&gt;
diff --git a/docs/development/CUSTOM_RULES.md b/docs/development/CUSTOM_RULES.md
@@ -277,9 +277,13 @@ const ruleTester = new ESLintUtils.RuleTester({
   parser: '@typescript-eslint/parser',
 });
 
-ruleTester.run('my-rule', rule {
-  valid: [/* ... */],
-  invalid: [/* ... */],
+ruleTester.run('my-rule', rule, {
+  valid: [
+    /* ... */
+  ],
+  invalid: [
+    /* ... */
+  ],
 });
 ```
 
