Fix mediaiwiki parser for non-lists that have multiple stars in line

Refs #9523
Fix indentation problems in PythonAlgorithms.

Fixes warning messages about failing to load plugins.
Refs #9523
Merge branch 'feature/9523_Tie_alg_summary_messages' into develop

Conflicts:
	Code/Mantid/Framework/PythonInterface/plugins/algorithms/WorkflowAlgorithms/Symmetrise.py
Refs #9523