C is just riddled with mistakes and this one finally gelled with me. Python taught me that whitespace is great for syntax and, in this case, I'm quite convinced that it should be used more firmly in most languages.
I use python at $dayjob, and I run into the limitations of whitespace as syntax all the time.
https://www.python.org/dev/peps/pep-3103/
It's quite frustrating as there are a lot of situations where a simple switch would be so nice...
I have been thinking about making a toy compiler (I wanted to write a borrow checker) that treats bad code as an error, solely aimed at numerical code - I have recently had "Scientific Programming in Python for physics etc." inflicted on me.
Slight tangent, but I think if Haskell enforced some kind of whitespace a la Python it would be much more approachable in real codebases (Haskell is usually quite readable if you are just translating mathematics into code but it - to me at least - feels dreadful as a productive language because of the way a lot of functions seem to be dumped onto into the text editor in a lot of the code I have read)