I find this page the cleanest: https://en.wikipedia.org/wiki/List_of_Unicode_characters. I can usually just do a Ctrl-F and find what I want.

Easy on windows: press and hold the alt key, and then 0151 on the numeric keypad.

If you're on windows and have a numeric keypad, it's alt-0150.

alt-0151 (numeric keypad) on windows

Some other useful ones to memorise:

0150 the endash, 0133 the ellipsis, 0145 the single quote opening, 0146 the apostrophe/single quote closing, 0147 and 0148 for double quotes, 0149 for a bullet point.

true, perhaps, but a colon would have been more appropriate here and programmers should be familiar enough with them also.

Agreed. Good typography is good writing.

I probably shouldn’t presume to speak for the OP, but given that they’re optional, I would think so, yes.