Readability changes:
* Tweak framing to also acknowledge that variadic generics have been wanted for other things too (though as far as I've been able to tell there isn't a consistent enough pattern to the other use cases to justify including them in the PEP)
* Move the Array example much earlier (both because reading a detailed example is going to be a faster way of getting the gist for people in a hurry, and because we want to make it clear to numerical computing folks from the start that we can also specify a datatype here). (We still have a more detailed Array example later; I'm leaving that there for the time being pending some discussion with Pradeep, but eventually I guess it'll be removed and absorbed into this earlier example)
* Make it clear that other types can appear in `Union` alongside `TypeVarTuple` instances.
Semantic changes:
* Disallow a `Union` of more than one type variable tuple (I thought this would be easier than concatenation of more than one type variable tuple, but Pradeep points out it could still get hairy for type checkers, so disallow it for now to be on the safe safe)
Also some *more* type fixes...
Semantic changes:
* Unparameterised variadics are compatible with parameterised variadics in both direction
* Allow suffixing
Readability changes:
* De-emphasise unparameterised `Array` behaving like `Array[Any, ...]` to avoid the suggestion that `Array[Any, ...]` might be supported
* Explicitly forbid `Array[Any, ...]` and similar
* Clarify that only `*args` can be annotated as `*Ts`; other arguments must use `Tuple[*Ts]`
* Remove 'Final Notes' section (I was hoping we'd have more edge cases to add to this, but in the end there haven't been any, and the only example we do have is obscure enough that I think we can just remove it)
Also some minor typo fixes.
There was confusion around what to do with SERVER_PORT if HTTP_HOST is
sent. Now it's clear these two variables are only used if HTTP_HOST is
not present.
Dustin Ingram
Irit Katriel
Dave Brondsema
Pablo Galindo
Sean Lockwood
Jacob Walls
David Foster
Naren Santhanam
Thomas Kluyver
Ken Jin
Dennis Sweeney
Brett Cannon
Florian Bruhin
Yury Selivanov
Matthew Rahtz
Inada Naoki
Eric Traut
Mark Shannon
Łukasz Langa
Ned Deily
Evan Carroll
Matej Dujava
JimJJewett
Brandt Bucher
Petr Viktorin
Mario Corchero