dox

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@21623 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2525 apply the suggested changes

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@21624 b5f69653-2bf5-0310-8201-b0dafb8e1405