Excluding rtd branch from coverage in qt_compat

Author: nicoddemus

pytestqt/qt_compat.py

@@ -54,7 +54,7 @@ def _import_module(moduleName):
     Qt = QtCore.Qt
     QEvent = QtCore.QEvent
 
-else:
+else:  # pragma: no cover
     USING_PYSIDE = True
 
     # mock Qt when we are generating documentation at readthedocs.org