GitHub's editor is useful for simple fixes, (formatting, markdown, typos,) but Codespaces seems extremely useful in building a reproducible dev environment for more complex packages / projects, including build tooling!
Yes but OP was talking about simple fixes in the first place
Even simple fixes often need to be run/tested before a PR can be put up with confidence.
a one minute change isn't ran or tested, almost by definition.
If you could have a fully-functional dev environment with pre-installed dependencies in 10s and the package takes 48 seconds to build and test, then you could.
Wrong
I'm aware of several places in my team's codebase where you can change a couple of characters and break the entire company if you didn't test the change.