Long Regular Expressions can be very difficult to read and revise when you come back to it later. Using the X) option allows you to Ignore Whitespace in AutoHotkey Regular Expression and insert comments as well as spread out your RegEx over multiple lines.
Below is the example code I use to ignore the whitespace in AutoHotkey RegEx which is demonstrated in the video below. It is a great way to make your code easier to read & maintain. It may take a few months until you revisit your RegEx but, when you do, you’ll thank me for it!