Describe the issue:

There are a number of areas throughout the numpy module that have Pylint linting issues, specifically in regards to using f-strings as opposed to the .format() method. I noticed that Pylint C0209 was particularly prevalent throughout the numpy repository, so I updated these linting errors.

See Pylint C0209 for more details.

Reproduce the code example:

import numpy as np

Error message:

Formatting a regular string which could be an f-string: Pylint C0209: consider-using-f-string

Python and NumPy Versions:

Python version >= 3.6

Runtime Environment:

No response

Context for the issue:

No response