https://github.com/tonsky/FiraCode
Depending on your (irrational) feelings about fonts and typography, this may either be the most amazing advance in coding readability you've ever encountered, or a mild improvement, or even annoying. But I love them!
A number of coding-oriented fonts support them now:
https://medium.com/larsenwork-andreas-larsen/ligatures-codin...
also, small grammar niggle: "it's" should only be used where it can be replaced with "it is" and still make sense; otherwise it's always "its" :)
I consider it essential when working with Javascript, thanks to the ~~boneheaded and objectively wrong~~ personal-opinion-based decision to make the strict equality operator longer than the coercive one. Making sure you have the right one is important, and while linters can also solve the problem, I like having it be very visual and obviously apparent.
Regarding `it's`: https://www.youtube.com/watch?v=063jQAM6N8I