Yep, that's what we do in the yapf autoformatter.  There's good reason too, source viewers and editors linkify URLs, if you break them across strings to fit within a line length limit, you get a broken partial url.  It also makes searching a codebase for references to specific identifiers much more difficult if you've broken up their value at arbitrary points.

There are other examples for this such as allowing trailing line comments for pylint, type checkers, etc. to go beyond 80 columns.

See the Exceptions in https://google.github.io/styleguide/pyguide.html#32-line-length for what make good practical examples.

I'm not convinced that codifying this in PEP-8 makes sense though unless we see this happening within the Python standard library code itself (the purpose of pep-8).  PEP-8 is not trying to be a style guide for all Python users, just a stdlib style guide that happens to serve a base from which to build upon.

-gps