In most cases "copy and paste" still just work (unless the code listing was a screenshot, which is a bad idea anyway for teaching code) and you can learn it tha

In most cases "copy and paste" still just work (unless the code listing was a screenshot, which is a bad idea anyway for teaching code) and you can learn it that way. Also most of the lists of intentionally ligatured operators are pretty small and easy to find reference materials for. For instance Fira Code's big first chart in this section: https://github.com/tonsky/FiraCode#whats-in-the-box https://github.com/tonsky/FiraCode#whats-in-the-box