leingang

Add option to `detect-threshold` to ignore shorter scene boundaries

2

**Description of Problem & Solution** Sometimes there are shorter fades-through-black in the middle of a scene and you don't want to introduce cut points at them. Currently the `process_frame` method...

I am pretty sure [`datetime`](https://docs.python.org/3/library/datetime.html#date-objects) is intended instead of [`dateutils`](https://pypi.org/project/dateutils/)

`letter.cls` documentation contains offensive term

1

This is a request for documentation enhancement only, and does not refer to any functionality. # Issue One of the examples in the `letter.cls` documentation ([line 843 of `letter.dtx`](https://github.com/latex3/latex2e/blame/22964cc5f5669e36abef76b2604c5a9e10435883/base/letter.dtx#L843)) contains...