For another notepad replacement that has recieved accolades from code-writing readers here, check out Notepad++. Programmer's Notepad is freeware, Windows only.

TED Notepad is a notepad replacement program that has a very straightforward goal: to be a better notepad, not a full-featured programmer’s editor. It succeeds admirably at that goal. When you ...

Thankfully, you can still re-enable the old version of Notepad by opening the Settings App (press Windows+i) and navigating to Apps > Advanced App Settings > App Execution Aliases ...