In Go, one has to always write the if-else bodies in curly braces (and, the opening brace should always be on the same line). I think this is great for two reasons. Firstly, it prevents bugs where a very tired programmer needs to add something to the else body, which is written like this:

    else
      foo();

and writes

    else
      foo();
      bar();

which compiles, but doesn't do what you think it does. And I have seen this bug in actual projects.

Secondly, along with gofmt, it prevents style wars.

"In Go, one has to always write the if-else bodies in curly braces (and, the opening brace should always be on the same line)."

If you really want to twist the knife... even Perl 5 gets this right. Even Perl 5 thinks that naked if/else bodies is too crazy and error prone.

'even Perl5'? Perl5 has also 'use strict' which ensure that variables ate declared before usage, a feature that Python doesn't have AFAIK.

That is why I got into the habit, very early on, to always, always enclose blocks in curly braces (or begin-end, depending on the language). If it is ingrained deeply enough, one no longer has to think about it.

But it is nice if the language enforces it. I would even go so far as to claim it is common sense.