Fix to lib/dispersion/matrix_exponential.py, since the svn copy command was used on non-updated version of the file.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-23
Parent: [r24241]
Child: [r24243]
