Because they become invisible in LaTeX

The Spanish notation makes the parentheses around n-k obsolete, clearly saving one symbol in some formulas is worth introducing a new one in others.

The image is a cropped xkcd with the text replaced but the same joke.

Yours is one louder

Like mathematicians and physicists.

I was a bit apprehensive because rust has like a gazillion different function types but here it seems to work like just any other language with a HM type system.

The fn(T)->R syntax works for functions without associated data, it discards details of the implementation and works like function pointers in C. This allows them to be copy and 'static.

The other function types can have data with them and have more type information at compile time which allows them to be inlined.
These functions each have their own unwritable type that implements the function traits (Fn(T)->R, FnMut(T)->R and FnOnce(T)->R) depending on their enclosed data.

I hope I remembered everything right from this video by Jon Gjengset.

Jetbrains products also have a fallback license after a year, so you retain perpetual acces to an old version* and I don’t think there is much change in the space of git UIs.

* iirc the version that you had one year before your payment lapsed, it applies to discounted versions as well

Prolog is not suitable for any problem domain, although this is more readily apparent for some domains than others.

For real, for real.