fix: grammar tests on Windows (#955)

* fix: grammar tests on Windows

* fix: only do on Windows

* nit:

packages/vscode/test/grammar/test.mjs

@@ -15,37 +15,6 @@ const grammars = readdirSync(grammarDir)
 
 const allGrammars = [...grammars, ...dummyGrammars];
 
-/**
- * Escapes command line arguments for Windows
- * @param {string} arg
- * @returns {string}
- *
- * Escaping sequences obtained trusting https://www.robvanderwoude.com/escapechars.php#:~:text=In%20batch%20files%2C%20the%20percent,instead%20of%20being%20further%20interpreted.
- */
-function escapeWindowsArg(arg) {
-	// If the argument doesn't contain spaces or special characters, return it as is
-	const single_charac_escape = /(['`,;=()<>|&^])/g;
-	const double_carat_escape = /(!)/g;
-	const percentage_escape = /(%)/g;
-	const backlash_escape = /([\\"[\].*?])/g;
-	if (
-		![single_charac_escape, double_carat_escape, percentage_escape, backlash_escape].some((regex) =>
-			regex.test(arg),
-		)
-	) {
-		return arg;
-	}
-
-	// This one must go first, since it would otherwise conflict with the ! rule
-	arg = arg.replace(single_charac_escape, '^$1');
-	arg = arg.replace(double_carat_escape, '^^$1');
-	arg = arg.replace(percentage_escape, '%$1');
-	arg = arg.replace(backlash_escape, '\\$1');
-
-	// Wrap the entire argument in double quotes
-	return `"${arg}"`;
-}
-
 /**
  * @param  {Parameters<typeof spawn>} arg
  * @returns {Promise<number | null>}
@@ -75,15 +44,10 @@ async function snapShotTest() {
 		'./test/grammar/fixtures/**/*.astro',
 		...allGrammars.reduce((/** @type string[] */ previous, path) => [...previous, '-g', path], []),
 		...extraArgs,
-	].map((arg) => {
-		if (isWindows) return escapeWindowsArg(arg);
-		return arg;
-	});
+	].map((arg) => (isWindows && arg.includes(' ') ? `"${arg}"` : arg))
 
 	const code = await promisifySpawn(isWindows ? 'pnpm.cmd' : 'pnpm', args, {
 		stdio: 'inherit',
-		// windows shell escaping on nodejs doesn't work
-		// See https://github.com/nodejs/node/issues/52554 and https://github.com/withastro/language-tools/pull/893
 		shell: isWindows,
 	});