Selecting parameterized tests with CLI does not respect order of parameterize arguments

[antonl]

Describe the bug

When selecting parameterized tests with multiple parameters using the command line, the full session name does not respect the order of parameters. Instead, the arguments are ordered alphabetically.

I believe this line is to blame: https://github.com/theacodes/nox/blob/aa9290713a4b664ea4ef4da0554afb09a626d7e1/nox/_parametrize.py#L48

How to reproduce

1. Install nox in a python=3.7 environment.
2. Copy the following noxfile.py to a test folder.

import nox

@nox.session(venv_backend="conda")
@nox.parametrize(
    ("a", "c", "b"),
    [
        ("a1", "c1", "b1"),
        ("a1", "c1", "b2"),
        ("a1", "c2", "b1"),
        ("a1", "c2", "b2"),
        ("a2", "c1", "b1"),
        ("a2", "c1", "b2"),
        ("a2", "c2", "b1"),
        ("a2", "c2", "b2"),
    ],
)
def test(session, a, b, c):
     print(f"running a={a}, b={b}, c={c}")

3. Run nox --list or nox to observe the name of the sessions. Sample output is below.

Expected behavior

The session names should have arguments in the same order as in the parameterize call, ie test(a="a1", c="c1", b="b1"). Instead, they are run in alphabetical order.

Output of nox --list:

Sessions defined in /nox_bug_report/noxfile.py:

* test(a='a1', b='b1', c='c1')
* test(a='a1', b='b2', c='c1')
* test(a='a1', b='b1', c='c2')
* test(a='a1', b='b2', c='c2')
* test(a='a2', b='b1', c='c1')
* test(a='a2', b='b2', c='c1')
* test(a='a2', b='b1', c='c2')
* test(a='a2', b='b2', c='c2')

sessions marked with * are selected, sessions marked with - are skipped.

Output of nox:

nox > Running session test(a='a1', b='b1', c='c1')
nox > Creating conda env in .nox/test-a-a1-b-b1-c-c1 with python
running a=a1, b=b1, c=c1
nox > Session test(a='a1', b='b1', c='c1') was successful.
nox > Running session test(a='a1', b='b2', c='c1')
nox > Creating conda env in .nox/test-a-a1-b-b2-c-c1 with python
running a=a1, b=b2, c=c1
nox > Session test(a='a1', b='b2', c='c1') was successful.
nox > Running session test(a='a1', b='b1', c='c2')
nox > Creating conda env in .nox/test-a-a1-b-b1-c-c2 with python
running a=a1, b=b1, c=c2
nox > Session test(a='a1', b='b1', c='c2') was successful.
nox > Running session test(a='a1', b='b2', c='c2')
nox > Creating conda env in .nox/test-a-a1-b-b2-c-c2 with python
running a=a1, b=b2, c=c2
nox > Session test(a='a1', b='b2', c='c2') was successful.
nox > Running session test(a='a2', b='b1', c='c1')
nox > Creating conda env in .nox/test-a-a2-b-b1-c-c1 with python
running a=a2, b=b1, c=c1
nox > Session test(a='a2', b='b1', c='c1') was successful.
nox > Running session test(a='a2', b='b2', c='c1')
nox > Creating conda env in .nox/test-a-a2-b-b2-c-c1 with python
running a=a2, b=b2, c=c1
nox > Session test(a='a2', b='b2', c='c1') was successful.
nox > Running session test(a='a2', b='b1', c='c2')
nox > Creating conda env in .nox/test-a-a2-b-b1-c-c2 with python
running a=a2, b=b1, c=c2
nox > Session test(a='a2', b='b1', c='c2') was successful.
nox > Running session test(a='a2', b='b2', c='c2')
nox > Creating conda env in .nox/test-a-a2-b-b2-c-c2 with python
running a=a2, b=b2, c=c2
nox > Session test(a='a2', b='b2', c='c2') was successful.
nox > Ran multiple sessions:
nox > * test(a='a1', b='b1', c='c1'): success
nox > * test(a='a1', b='b2', c='c1'): success
nox > * test(a='a1', b='b1', c='c2'): success
nox > * test(a='a1', b='b2', c='c2'): success
nox > * test(a='a2', b='b1', c='c1'): success
nox > * test(a='a2', b='b2', c='c1'): success
nox > * test(a='a2', b='b1', c='c2'): success
nox > * test(a='a2', b='b2', c='c2'): success