Log fix & testing tweak

- Fixed a minor logging bug in some bootstrapping code
- Add some support for pytest (as a unittest running, as the output is pretty!)

ksconf/commands/__init__.py

@@ -544,7 +544,7 @@ def get_all_ksconf_cmds(on_error="warn"):
             cmd_cls = entry.load()
         except (ImportError, NameError, SyntaxError) as e:
             if on_error == "warn":
-                warn("Unable to load entrypoint for {}.  Disabling."
+                warn("Unable to load entrypoint for {}.  Disabling.\n"
                      "Base exception {}.".format(name, e), KsconfPluginWarning)
             elif on_error == "return":
                 error = "Internal error:  {}".format(e)
@@ -553,7 +553,7 @@ def get_all_ksconf_cmds(on_error="warn"):
                 raise e
             continue
         if not issubclass(cmd_cls, KsconfCmd):
-            msg = "Issue loading class for entrypoint:  Disabling." \
+            msg = "Issue loading class for entrypoint:  Disabling.\n" \
                   "{!r} is not derived from KsconfCmd.  ".format(entry)
             if on_error == "warn":
                 warn(msg, KsconfPluginWarning)

tox.ini

@@ -11,3 +11,10 @@ skip_missing_interpreters = true
 commands = {envpython} setup.py install
            {envpython} -m unittest discover -s tests
 deps = -r requirements.txt
+
+[pytest]
+testpaths =
+    tests
+filterwarnings =
+# Can't seem to exclude TestWorkDir any other way, so we just filter out warning about it (which only pytest emits).  Easier than renaming the class
+    ignore:.*test class 'TestWorkDir'.*:pytest.PytestCollectionWarning