Default indentation of dependencies in pyproject.toml

[my1e5]

While it is not explicitly stated, the PyPA guide to the pyproject.toml file uses two spaces for the default indentation of TOML arrays - see https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#dependencies-and-requirements. uv is currently using four spaces.

I know that uv is able to respect the existing indentation level in the pyproject.toml file (see #5009) which is nice.

Nevertheless, I wanted to pose this as an open question as to what the default setting should be.

(The same discussion from Rye - astral-sh/rye#1078)

[zanieb]

I think it should be changed to two.