add test & fix lint

doc/api/test.md

@@ -1501,7 +1501,7 @@ added:
 changes:
   - version: REPLACEME
     pr-url: https://github.com/nodejs/node/pull/47586
-    description: The `before` function was added to TestContext
+    description: The `before` function was added to TestContext.
 -->
 
 An instance of `TestContext` is passed to each test function in order to
@@ -1528,7 +1528,6 @@ added: REPLACEME
 This function is used to create a hook running before running a suite.
 before subtest of the current test.
 
-
 ### `context.beforeEach([fn][, options])`
 
 <!-- YAML

test/fixtures/test-runner/output/hooks.js

@@ -4,6 +4,8 @@ const common = require('../../../common');
 const assert = require('assert');
 const { test, describe, it, before, after, beforeEach, afterEach } = require('node:test');
 
+before((t) => t.diagnostic('before 1 called'));
+
 describe('describe hooks', () => {
   const testArr = [];
   before(function() {
@@ -157,3 +159,5 @@ test('t.after() is called if test body throws', (t) => {
   });
   throw new Error('bye');
 });
+
+before((t) => t.diagnostic('before 2 called'));

test/fixtures/test-runner/output/hooks.snapshot

@@ -467,7 +467,6 @@ not ok 11 - t.afterEach throws
         *
         *
         *
-        *
       ...
     # Subtest: 2
     ok 2 - 2
@@ -500,7 +499,6 @@ not ok 12 - afterEach when test fails
         *
         *
         *
-        *
       ...
     # Subtest: 2
     not ok 2 - 2
@@ -541,12 +539,11 @@ not ok 14 - t.after() is called if test body throws
     *
     *
     *
-    *
-    *
-    *
   ...
 # - after() called
 1..14
+# before 1 called
+# before 2 called
 # tests 38
 # suites 8
 # pass 14