Switch to black's default 88 character limit

[redeboer]

https://black.readthedocs.io/en/stable/the_black_code_style/current_style.html#line-length

Note: the line width for notebooks has to be set to 85, so that code blocks render nicely in the Sphinx Book Theme.

[redeboer]

Closed by 27dba75 and

[redeboer]

• style: switch to black's default 88 line width qrules#188
• style: switch to black's default 88 line width ampform#298
• style: switch to black's default 88 line width tensorwaves#449
• style: switch to black's default 88 line width compwa.github.io#157
• style: switch to black's default 88 line width PWA-pages#169