test: address nits and rename the corresponding fixture

Refs: #19105

PR-URL: #19161
Refs: https://github.com/nodejs/node/blob/master/doc/guides/writing-tests.md#test-structure
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

test/sequential/test-fs-stat-sync-overflow.js

@@ -34,7 +34,7 @@ const assert = require('assert');
 const { exec } = require('child_process');
 
 const cmd =
-  `"${process.execPath}" "${fixturesDir}/test-regress-GH-4015.js"`;
+  `"${process.execPath}" "${fixturesDir}/test-fs-stat-sync-overflow.js"`;
 
 exec(cmd, function(err, stdout, stderr) {
   assert(/RangeError: Maximum call stack size exceeded/.test(stderr));

test/sequential/test-net-response-size.js

@@ -23,7 +23,7 @@
 const common = require('../common');
 
 // Make sure the net module's server doesn't throw an error when handling
-// responses that are either too long or too small (especially on windows)
+// responses that are either too long or too small (especially on Windows)
 // https://github.com/nodejs/node-v0.x-archive/issues/1697
 
 const net = require('net');