#2370 a bit more tweaking

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@19108 b5f69653-2bf5-0310-8201-b0dafb8e1405
Tidy a couple of comments

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@19109 b5f69653-2bf5-0310-8201-b0dafb8e1405