STY: remove trailing whitespace

[klauer]

Using pre-commit to help us out:

.pre-commit-config.yaml

# See https://pre-commit.com for more information
# See https://pre-commit.com/hooks.html for more hooks
repos:
-   repo: https://github.com/pre-commit/pre-commit-hooks
    rev: v2.5.0
    hooks:
    -   id: no-commit-to-branch
    -   id: trailing-whitespace

$ pip install pre-commit
$ pre-commit install
$ pre-commit run --all-files

This can help even if your editor doesn't support fixing trailing whitespace, for example, by automatically running the hooks defined in the config file on each commit.

[prjemian]

Usually I am completely hands-off with modifications to the LICENSE file, even cosmetic changes such as re-flowing paragraphs. These changes will not be noticed by reasonable people.

tldr: OK

[prjemian]

If you have other changes, tag me again for review.