fix long description formatting

Author: cadenmyers13

README.rst

@@ -38,12 +38,15 @@
 Tool for visualizing 3D diffraction and PDF Images.
 
 * Diffpy.fourigui is a tool to visualize and process 3D data sets written with the Python programming language.
-Diffpy.fourigui always displays one slice perpendicular to one axis and allows scrolling through the 3D data set along
-the given axis with a slider. It shows feedback values such as global and local maxima, minima or NAN ratios.
-The matplotlib panel e.g. for zooming and saving figures is featured. Diffpy.fourigui is designed for the processing of 3D
-atomic pair distribution functions (PDFs). One can load a 3D reciprocal space scattering volume which can be Fourier
-transformed to the 3D PDF. Thereby, one can apply cut off frequencies beyond and below given Q values, compare the
-results and switch between the scattering volume in reciprocal space and 3D PDF in real space.
+
+  Diffpy.fourigui always displays one slice perpendicular to one axis and allows scrolling through the 3D data set along
+  the given axis with a slider. It shows feedback values such as global and local maxima, minima, or NAN ratios. The 
+  matplotlib panel, e.g., for zooming and saving figures, is featured.
+
+  Diffpy.fourigui is designed for the processing of 3D atomic pair distribution functions (PDFs). One can load a 3D 
+  reciprocal space scattering volume which can be Fourier transformed to the 3D PDF. Thereby, one can apply cut-off 
+  frequencies beyond and below given Q values, compare the results, and switch between the scattering volume in reciprocal 
+  space and the 3D PDF in real space.
 
 For more information about the diffpy.fourigui library, please consult our `online documentation <https://diffpy.github.io/diffpy.fourigui>`_.