Cleanup _utils.py functions. ✨🧹✨

[tomchristie]

Possibly a good issue for new contributors?...

The _utils.py module has a smorgasbord of utility functions. Many of these are only used in one place in httpx and it would be easier to comprehend if they were inlined, or refactored closer to where they're being used. ✨🧹✨

Pull requests for this should typically tackle one item at a time for easier review. 🤓

[RafaelWO]

I'm happy to take a look at this 🙂

Pull requests for this should typically tackle one item at a time for easier review

I'm not fully sure if I understand this correctly. Do you mean per function or per "topic"?

[tomchristie]

@RafaelWO Wonderful, thanks. 😊

Do you mean per function or per "topic"?

Use your own judgement I guess, we can have a conversation if there's any awkward points.
As a guideline, simpler PRs tend to be more easily acceptable.