trailing-whitespace (W291)

Derived from the pycodestyle linter.

Fix is always available.

What it does

Checks for superfluous trailing whitespace.

Why is this bad?

According to PEP 8, "avoid trailing whitespace anywhere. Because it’s usually invisible, it can be confusing"

Example

spam(1) \n#

Use instead:

spam(1)\n#

Fix safety

This fix is marked unsafe if the whitespace is inside a multiline string, as removing it changes the string's content.