typo in draft

[bylee20]

I am not sure here is right place.
Please forgive me if I am at wrong place.

I found a typo in recently updated draft.

https://brycelelbach.github.io/wg21_p2300_execution/execution.html#spec-execution.syn

Here,

  template <class T>
    concept queryable = destructible;

The template argument for std::destructible is missing.

[bylee20]

Also, I can see some out-of-order declarations in 11.1. Header synopsis.
For instance, sender_to concept uses completion_signatures_of_t and connect which are declared/defined later.

I am not familiar with this kind of draft document so maybe I should not consider those declarations are actually compilable code. If you want me to report them too, please let me know.

[bylee20]

Another typo: https://brycelelbach.github.io/wg21_p2300_execution/execution.html#spec-execution.senders.consumers.sync_wait

Here, sync-wait-type is defined as a alias template which takes only one parameter but it is mentioned as sync-wait-type<S, sync-wait-env>.