Parse /.../ JavaScript/TypeScript regex syntax correctly.

[rvantonder]

Fix issue where regular expression syntax /.../ isn't parsed to escape it's contents. When the contents affect (unbalanced parens or quotes), the file won't be parsed correctly. Buggy example:

async function handleRoot(req: http.IncomingMessage, resp: http.ServerResponse, entryPointPath: string, environmentService: INativeEnvironmentService) {
    if (!req.headers.host) {
        return serveError(req, resp, 400, 'Bad request.');
    }

    const workbenchConfig = {
        developmentOptions: {
            enableSmokeTestDriver: environmentService.driverHandle === 'web' ? true : undefined
        }
    };

    const escapeQuote = (str: string) => str.replace(/"/g, '"');
    const entryPointContent = (await fs.promises.readFile(entryPointPath))
        .toString()
        .replace('{{WORKBENCH_WEB_CONFIGURATION}}', escapeQuote(JSON.stringify(workbenchConfig)));

    resp.writeHead(200, {
        'Content-Type': 'text/html'
    });
    return resp.end(entryPointContent);
}

function main(...)

and comby 'main(...)' '' -match-only returns no results