New check: break at the top of while True loop

[nickdrozd]

Current problem

A not-uncommon pattern is to check some condition at the top of a while True loop and break if the condition is met:

while True:
    if condition:
        break

    do_stuff()

There is an instance of this in the Pylint codebase.

Desired solution

It would be more straightforward and less verbose to negate the condition and move it into the while expression:

while not condition:
    do_stuff()

Add a new check for the following circumstance:

1. There is a while loop with True condition (or more generally, constant condition);
2. the first statement of the loop body is an if statement; and
3. the first statement of the if body is a break statement.

In this case, emit a suggestion to negate the condition and move it to the while.

I don't know what the name of the warning should be. Suggestions welcome!

Additional context

No response

[yushao2]

it's finally done! thanks for this suggestion :)