I worked on #2993 and ran into issues that the formatter tests are failing on Windows because `writeln!` emits `\n` as line terminator on all platforms, but `git` on Windows converted the line endings in the snapshots to `\r\n`.
I then tried to replicate the issue on my Windows machine and was surprised that all linter snapshot tests are failing on my machine. I figured out after some time that it is due to my global git config keeping the input line endings rather than converting to `\r\n`.
Luckily, I've been made aware of #2033 which introduced an "override" for the `assert_yaml_snapshot` macro that normalizes new lines, by splitting the formatted string using the platform-specific newline character. This is a clever approach and gives nice diffs for multiline fixes but makes assumptions about the setup contributors use and requires special care whenever we use line endings inside of tests.
I recommend that we remove the special new line handling and use `.gitattributes` to enforce the use of `LF` on all platforms [guide](https://docs.github.com/en/get-started/getting-started-with-git/configuring-git-to-handle-line-endings). This gives us platform agnostic tests without having to worry about line endings in our tests or different git configurations.
## Note
It may be necessary for Windows contributors to run the following command to update the line endings of their files
```bash
git rm --cached -r .
git reset --hard
```
When creating a dict with string keys, some prefer to call dict instead of writing a dict literal.
For example: `dict(a=1, b=2, c=3)` instead of `{"a": 1, "b": 2, "c": 3}`.
This extends the autofix for TID252 to work with for relative imports without `module` (i.e. `from .. import`). Tested with `matplotlib` and `bokeh`.
(Previously it would panic on unwrap of the module)
Note that pandas has [replaced](6057d7a93e) `absolufy-imports` with `ruff` now!
# Summary
This allows users to do things like:
```py
# ruff: noqa: F401
```
...to ignore all `F401` directives in a file. It's equivalent to `per-file-ignores`, but allows users to specify the behavior inline.
Note that Flake8 does _not_ support this, so we _don't_ respect `# flake8: noqa: F401`. (Flake8 treats that as equivalent to `# flake8: noqa`, so ignores _all_ errors in the file. I think all of [these usages](https://cs.github.com/?scopeName=All+repos&scope=&q=%22%23+flake8%3A+noqa%3A+%22) are probably mistakes!)
A couple notes on the details:
- If a user has `# ruff: noqa: F401` in the file, but also `# noqa: F401` on a line that would legitimately trigger an `F401` violation, we _do_ mark that as "unused" for `RUF100` purposes. This may be the wrong choice. The `noqa` is legitimately unused, but it's also not "wrong". It's just redundant.
- If a user has `# ruff: noqa: F401`, and runs `--add-noqa`, we _won't_ add `# noqa: F401` to any lines (which seems like the obvious right choice to me).
Closes#1054 (which has some extra pieces that I'll carve out into a separate issue).
Closes#2446.
