chore: cleaner exception tracebacks

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

unit_test/main_tests/conftest.py

@@ -31,7 +31,8 @@ def mock_protection(monkeypatch):
     """
 
     def fail_on_call(*args, **kwargs):
-        raise RuntimeError("This should never be called")
+        msg = "This should never be called"
+        raise RuntimeError(msg)
 
     def ignore_call(*args, **kwargs):
         pass

unit_test/main_tests/main_options_test.py

@@ -126,7 +126,8 @@ def get_default_repair_command(platform):
     elif platform == "windows":
         return ""
     else:
-        raise ValueError("Unknown platform", platform)
+        msg = f"Unknown platform: {platform!r}"
+        raise ValueError(msg)
 
 
 @pytest.mark.parametrize("repair_command", [None, "repair", "repair -w {dest_dir} {wheel}"])