test: use string instead of RegExp in split()

PR-URL: #13710
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

test/parallel/test-http-outgoing-first-chunk-singlebyte-encoding.js

@@ -24,7 +24,7 @@ for (const enc of ['utf8', 'utf16le', 'latin1', 'UTF-8']) {
  const headerEnd = received.indexOf('\r\n\r\n', 'utf8');
  assert.notStrictEqual(headerEnd, -1);
 
- const header = received.toString('utf8', 0, headerEnd).split(/\r\n/);
+ const header = received.toString('utf8', 0, headerEnd).split('\r\n');
  const body = received.toString(enc, headerEnd + 4);
 
  assert.strictEqual(header[0], 'HTTP/1.1 200 OK');

test/parallel/test-repl-setprompt.js

@@ -44,6 +44,6 @@ child.stdin.end(`e.setPrompt("${p}");${os.EOL}`);
 child.on('close', function(code, signal) {
  assert.strictEqual(code, 0);
  assert.ok(!signal);
- const lines = data.split(/\n/);
+ const lines = data.split('\n');
  assert.strictEqual(lines.pop(), p);
 });

test/parallel/test-stdin-script-child.js

@@ -19,7 +19,7 @@ for (const args of [[], ['-']]) {
 
  child.stderr.setEncoding('utf8');
  child.stderr.on('data', function(c) {
- console.error(`> ${c.trim().split(/\n/).join('\n> ')}`);
+ console.error(`> ${c.trim().split('\n').join('\n> ')}`);
  });
 
  child.on('close', common.mustCall(function(c) {