Run doctests in the main py.test run

pytest.ini

@@ -1,5 +1,8 @@
 [pytest]
-addopts = --assert=plain
+addopts = --assert=plain --doctest-modules
+
+# Ignore broken files in blackbox test directories
+norecursedirs = .* completion refactor
 
 # Activate `clean_jedi_cache` fixture for all tests.  This should be
 # fine as long as we are using `clean_jedi_cache` as a session scoped