Algorithm description cannot be edited properly

Let's consider the algorithm tutorial/cropping_rgb/3/.

This algorithm has both a short and long descriptions (as shown by clicking on more). However, if we press on edit, the long description field will be filled with a filename http://www.beat-eu.org/platform/api/algorithms/tutorial/cropping_rgb/3/fe/30/tutorial/cropping_rgb/3.rst instead of the real content of the long description.