Update README.rst

Author: XiaohaoYang

README.rst

@@ -8,9 +8,9 @@ software. If you use this program to do productive scientific research that
 leads to publication, we kindly ask that you acknowledge use of the program 
 by citing the following paper in your publication:
 
-> Xiaohao Yang, Pavol Juhas, Simon J. L. Billinge, On the estimation of 
-statistical uncertainties on powder diffraction and small angle 
-scattering data from 2-D x-ray detectors, arXiv:1309.3614 
+    Xiaohao Yang, Pavol Juhas, Simon J. L. Billinge, On the estimation of 
+    statistical uncertainties on powder diffraction and small angle 
+    scattering data from 2-D x-ray detectors, arXiv:1309.3614 
 
 To learn more about diffpy.srxplanar library, see the examples directory
 included in this distribution or the API documentation at