Use pytest-pretty

[dandavison]

https://github.com/samuelcolvin/pytest-pretty

                                                  Summary of Failures                                                   
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┓
┃  File                           ┃  Function                      ┃  Function Line  ┃  Error Line  ┃  Error           ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━┩
│  tests/worker/test_workflow.py  │  test_workflow_deadlock_inte…  │  7118           │  7141        │  AssertionError  │
│  tests/worker/test_workflow.py  │  test_activity_pause_cancell…  │  7701           │  7733        │  AssertionError  │
└─────────────────────────────────┴────────────────────────────────┴─────────────────┴──────────────┴──────────────────┘
Results (304.31s):
         2 failed
       398 passed
         8 skipped
        10 warnings