Filename is not properly formatted in LinearisedAdvection (issue #316 (closed)).
Use boost::format to correctly format the filename.
Please suggest any people who would be appropriate to review your code.
Please add any other information that could be useful for reviewers.
[ ] Functions and classes, or changes to them, are documented. [ ] User guide/documentation is updated.
Changelog is updated.
Suitable tests added for new functionality.
Contributed code is correctly formatted. (See the contributing guidelines). [ ] License added to any new files.
No extraneous files have been added (e.g. compiler output or test data files).