* Fix encoding error with non-prettified encoded responses
Removed `--format-option response.as` an promote `--response-as`: using
the format option would be misleading as it is now also used by non-prettified
responses.
* Encoding refactoring
* split --response-as into --response-mime and --response-charset
* add support for Content-Type charset for requests printed to terminal
* add support charset detection for requests printed to terminal without a Content-Type charset
* etc.
* `test_unicode.py` → `test_encoding.py`
* Drop sequence length check
* Clean-up tests
* [skip ci] Tweaks
* Use the compatible release clause for `charset_normalizer` requirement
Cf. https://www.python.org/dev/peps/pep-0440/#version-specifiers
* Clean-up
* Partially revert d52a4833e4
* Changelog
* Tweak tests
* [skip ci] Better test name
* Cleanup tests and add request body charset detection
* More test suite cleanups
* Cleanup
* Fix code style in test
* Improve detect_encoding() docstring
* Uniformize pytest.mark.parametrize() calls
* [skip ci] Comment out TODOs (will be tackled in a specific PR)
Co-authored-by: Jakub Roztocil <jakub@roztocil.co>
Before this change, the following invocation would not work
```
$ http http://neverhttps.com <&-
```
The "<&-" at the end closes the stdin fd. Specifically, it would fail with
```
...
File "/home/mgsloan/.local/lib/python3.6/site-packages/httpie/context.py", line 26, in Environment
stdin_isatty = stdin.isatty()
AttributeError: 'NoneType' object has no attribute 'isatty'
```
This can occur when httpie is being programmatically invoked, and may
as well be supported.
