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Go, Swift, and C# all have braces, looks like Python and CoffeeScript were overruled. I do agree with you on the semicolons, though (that's 4-to-1).

Well, the text mentions the "best things".

I wouldn't consider braces the best things in go, swift or c#.

Clearly defined blocks are not a bad thing, and let you do things python can't.

Can you give an example?

The best justification is probably that you lose an entire class of errors, but imo you improve language expressiveness.

Rust takes advantage of it's braces in good ways, I'd say.

I'd like some examples, too.

I found myself struggling with whitespace-languages at first.

It lets you paste some code and hit auto-format.

I'm actually kinda serious. Moving pieces of Python code around is unnecessarily error-prone. I don't consider this to be a good tradeoff.

Automatic, unambiguous indentation of code by editor.

Multi-line lambdas, for one.

Wasn't the multi-line lambda problem in Python due to the fact how small lambdas have to be in Python?

There's nothing "best" about significant whitespace.