Extra name capitalization in pyproject.toml

[ryancausey]

I was attempting to use this extras definition in my pyproject.toml:

[tool.poetry.extras]
AWS = ["pytest-aws-fixtures"]

However, this led to no extras being installed when running poetry install --all-extras or poetry install --extra AWS. I had to change the configuration to the following:

[tool.poetry.extras]
aws = ["pytest-aws-fixtures"]

Then it worked once the "aws" was all lowercase. Is this expected behavior?

[dimbleby]

does not reproduce