That's by design. If you include a
'.' in the criteria then the program assumes that you know exactly what you're looking for and adds start and end of expression markers, ie
If you want to search for partial matches then add wildcard characters, e.g.
This behaviour is designed to allow more precise searching so that a search for
only returns files like:
and NOT files like:
The user can achieve a wider search simply by adding a wildcard, e.g.