dvc.yaml: ruamel.yaml 0.17.22 oddly splits long strings

[efiop]

ruamel.yaml 0.17.22:

stages:
  copy-first-line:
    cmd: python
      /private/var/folders/fn/lxr30v5j0jldz5zbsb0jx_pr0000gn/T/pytest-of-efiop/pytest-10/test_cmd_changes_other_orders_0/head.py  foo  bar  foobar
    deps:
    - bar
    - foo
    - foobar
    outs:
    - bar-1
    - foo-1
    - foobar-1

vs old:

stages:
  copy-first-line:
    cmd: python  /private/var/folders/fn/lxr30v5j0jldz5zbsb0jx_pr0000gn/T/pytest-of-efiop/pytest-12/test_cmd_changes_other_orders_0/head.py  foo  bar  foobar
    deps:
    - bar
    - foo
    - foobar
    outs:
    - bar-1
    - foo-1
    - foobar-1

Which is causing our CI to fail on tests/func/test_lockfile.py::test_cmd_changes_other_orders_are_preserved

[pmrowla]

probably related to the change for https://sourceforge.net/p/ruamel-yaml/tickets/427/

ruamel has a hidden default width of 80, so it looks like it will force wrapping if the line has a string token > length 80 now. At least in our tests we probably need to explicitly set yaml.width = sys.maxsize to prevent any wrapping since we use string compares in the test asserts

[efiop]

@pmrowla Thanks for the research! 🙏 Very good suggestion!

Surprised by this lossy folding and the linked issue suggests that this might not be solved any time soon. I'll just adjust the test for now.

[efiop]

Just modified the test for now as it was pretty fragile anyway.