Added a pre-commit config file and reformatted all the files accordingly by using it.

toolboxes/Utilities/README.rst

@@ -74,4 +74,4 @@ gprMax produces a separate output file for each trace (A-scan) in a B-scan. This
 where:
 
 * ``basefilename`` is the base name file of the output file series, e.g. for ``myoutput1.h5``, ``myoutput2.h5`` the base file name would be ``myoutput``
-* ``remove-files`` is an optional argument (flag) that when given will remove the separate output files after the merge.
+* ``remove-files`` is an optional argument (flag) that when given will remove the separate output files after the merge.