This plugin lets you easily see errors and warnings in the Maya console.
Tested on Maya 2024+

It's quite primitive, e.g. the line // https://www.autodesk.com/maya-arnold-not-available-error will be colored as an error.

Install

1. Either;
   a. Copy the script in your plugins folder %UserProfile%\Documents\Maya\plug-ins.
   b. Use the supplied script_editor_highlighter.mod (Maya module)
2. Enable the plugin.
3. Open script editor.

NOTE: It won't work until you go out of focus, so click on the viewport then back on the editor.

Reference

see https://hannesdelbeke.github.io/wiki/tech%20art/maya/Maya%20script%20editor%20syntax%20highlight/