Update lephare.py - Githubissues

This was a simple bug possibly caused by a git merge not being properly managed.

Problem & Solution Description (including issue #)

I am going to change this code significantly but this is clearly a bug that should be fixed now.

[x] My code follows the code style of this project
[ ] I have written unit tests or justified all instances of #pragma: no cover; in the case of a bugfix, a new test that breaks as a result of the bug has been added
[x] My code contains relevant comments and necessary documentation for future maintainers; the change is reflected in applicable demos/tutorials (with output cleared!) and added/updated docstrings use the NumPy docstring format
[x] Any breaking changes, described above, are accompanied by backwards compatibility and deprecation warnings