diff --git a/src/sage/combinat/root_system/reflection_group_real.py b/src/sage/combinat/root_system/reflection_group_real.py
index 461019c5f89..2cc7fce485c 100644
--- a/src/sage/combinat/root_system/reflection_group_real.py
+++ b/src/sage/combinat/root_system/reflection_group_real.py
@@ -709,29 +709,27 @@ def simple_root_index(self, i):
     
     def bruhat_cone(self, x, y, side = 'upper'):
         r"""
-        Returns the polyhedral cone generated by the set of positive roots ``beta`` 
-        where ``s_beta`` is the reflection corresponding to ``beta`` and:
-        
+        Returns the polyhedral cone generated by the set of positive roots ``beta`` where ``s_beta`` is the reflection corresponding to ``beta`` and:
+
         For ``side`` = ``'upper'``: ``s_beta`` ``x`` covers ``x`` and ``x`` <= ``s_beta`` ``x`` <= ``y``.
-        
+
         For ``side`` = ``'lower'``: ``y`` covers ``s_beta`` ``y`` and ``x`` <= ``s_beta`` ``y`` <= ``y``.
-        
-        
+
         INPUT:
 
         - ``side`` (default: ``'upper'``) -- must be one of the following:
 
           * ``'upper'`` - roots of reflections corresponding to atoms in the interval [``x``, ``y``]
           * ``'lower'`` - roots of reflections corresponding to coatoms in the interval [``x``, ``y``]
-        
+
         EXAMPLES::
-        
+
             sage: W = ReflectionGroup(['A',2])                          # optional - gap3
             sage: x = W.from_reduced_word([1])                          # optional - gap3
             sage: y = W.w0                                              # optional - gap3
             sage: W.bruhat_cone(x, y)                                   # optional - gap3
             A 2-dimensional polyhedron in ZZ^2 defined as the convex hull of 1 vertex and 2 rays
-            
+
             sage: W = ReflectionGroup(['E',6])                          # optional - gap3
             sage: x = W.one()                                           # optional - gap3
             sage: y = W.w0                                              # optional - gap3