[layer8]

I do the same in source documentation, to limit the portion that has to be reformatted when changing something in the middle.

[hprotagonist]

i’d have trouble keeping line length limits in docstrings.

[layer8]

It doesn't mean that a sentence can't contain line breaks. It means that there's a line break after each sentence. This causes paragraph reformatting (for maintaining line length) to be restricted to the current sentence, instead of also affecting the following sentences.