next.js

f3656691 - [test] Use `--debug-build-paths` instead of `NEXT_PRIVATE_APP_PATHS` (#85504)

[test] Use `--debug-build-paths` instead of `NEXT_PRIVATE_APP_PATHS` (#85504) With `--debug-build-paths` being added in #85052, we can now use this CLI flag in tests, instead of setting the private environment variable `NEXT_PRIVATE_APP_PATHS`. Related to this change, this PR fixes how we print the dev, start and build commands during tests, by properly escaping the CLI arguments. This ensures that the command is copy-pasteable even when the args contain escaped characters.