use --include rather than --omit for coverage

Author: dnozay

tox.ini

@@ -25,8 +25,8 @@ commands = coverage erase
 
 [testenv:end]
 commands =
-    coverage report --omit='.tox/*'
-    coverage html --omit='.tox/*'
+    coverage report --include='setup.py,xmlrunner/*,tests/*'
+    coverage html --include='setup.py,xmlrunner/*,tests/*'
 
 [testenv:quality]
 ignore_outcome = True