test: make error stack test engine agnostic

Revise test-internal-util-decorate-error-stack so that it does not
depend on behavior specific to V8.

PR-URL: #16272
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Author: Trott

test/parallel/test-internal-util-decorate-error-stack.js

@@ -24,11 +24,16 @@ const obj = {};
 decorateErrorStack(obj);
 assert.strictEqual(obj.stack, undefined);
 
-// Verify that the stack is decorated when possible
+// Verify that the stack is decorated when possible.
 function checkStack(stack) {
-  const matches = stack.match(/var foo bar;/g);
-  assert.strictEqual(Array.isArray(matches), true);
-  assert.strictEqual(matches.length, 1);
+  // Matching only on a minimal piece of the stack because the string will vary
+  // greatly depending on the JavaScript engine. V8 includes `;` because it
+  // displays the line of code (`var foo bar;`) that is causing a problem.
+  // ChakraCore does not display the line of code but includes `;` in the phrase
+  // `Expected ';' `.
+  assert.ok(/;/g.test(stack));
+  // Test that it's a multiline string.
+  assert.ok(/\n/g.test(stack));
 }
 let err;
 const badSyntaxPath =