Does anyone have any suggestions for typing practice programs that involve coding symbols? I recently got a new mechanical keyboard and I want to practice the new layout when I'm not also trying to think and solve programming problems.
Honestly, I'd recommend using the good ol' gtypist.
It uses mostly real (or contrived) segments of text, which appear as if they were taken out of newspapers or personal letters. It has both beginner and advanced sets of text, and a whole community of custom texts that you can use. I've personally learned touch typing from scratch by using this program alone.
Monkeytype.com has many "code" dictionaries to choose from.
I advice either monkeytype or keybr, both have a setting for code