Upgrade Ruff to v0.3.0

[krishnan-chandra]

This version stabilizes the Ruff formatter, which is something we should pull in to Pants - see more details here. This causes some divergences from Black's formatting, but the differences seem reasonable and users will not realistically use both.

There are some changes to formatting of type declarations in this release like the one below, so users will see some changes:

-    description: Optional[
-        Annotated[str, StringConstraints(strip_whitespace=True)]
-    ] = None
+    description: Optional[Annotated[str, StringConstraints(strip_whitespace=True)]] = (
+        None
+    )

However, this seems like a definite improvement over the previous style / easier to read.

[huonw]

Thank you 👍

For the breaking changes/differences, Pants is "just" a tool runner for things like this: it's not our problem if the underlying tool makes breaking changes. It may impact users if they're using it without pinning, but I think that's out of scope of Pants' stability promise (although maybe not explicitly so), and the resolution there is for the user to take over management of the tool via their own install_from_resolve configuration (etc.)

[huonw]

That said, there is the possibility of user-visible changes, so I think we should be flagging this as a category that appears release notes. I don't know if user api change is perfect, but it's close enough, I think.

[krishnan-chandra]

it's not our problem if the underlying tool makes breaking changes

Yeah hard agree there - I think if you're using a formatter tool you should just delegate decisions to the tool and I have no objections to keeping it that way. My main reason for adding this change to Pants is to get onto the stable formatter ASAP to minimize future changes.