test: refactor using template string

Use template string where it's appropriate. PR-URL: #17314 Reviewed-By: Daijiro Wachi <[email protected]> Reviewed-By: Vse Mozhet Byt <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: Jon Moss <[email protected]> Reviewed-By: James M Snell <[email protected]>

Author: kt3k

test/abort/test-zlib-invalid-internals-usage.js

@@ -13,8 +13,8 @@ if (process.argv[2] === 'child'){
 assert.strictEqual(child.stdout.toString(),'');
 assert.ok(child.stderr.includes(
 'WARNING: You are likely using a version of node-tar or npm that '+
-'is incompatible with this version of Node.js.'+os.EOL+
+`is incompatible with this version of Node.js.${os.EOL}`+
 'Please use either the version of npm that is bundled with Node.js, or '+
 'a version of npm (> 5.5.1 or < 5.4.0) or node-tar (> 4.0.1) that is '+
-'compatible with Node.js 9 and above.'+os.EOL));
+`compatible with Node.js 9 and above.${os.EOL}`));
 }