test: make test-repl-syntax-error-stack agnostic

Revise test 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-repl-syntax-error-stack.js

@@ -11,7 +11,12 @@ process.on('exit', () => {
 });
 
 common.ArrayStream.prototype.write = function(output) {
-  if (/var foo bar;/.test(output))
+  // 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 ';' `.
+  if (/;/.test(output))
     found = true;
 };