fixed typo

Author: simongravelle

docs/sphinx/source/non-tutorials/before-you-start.rst

@@ -63,9 +63,9 @@ VMD (optional)
 
 ..  container:: justify
 
-    In order to visualize the simulation, |VMD| version 1.9.3 will
+    To visualize the simulation, |VMD| version 1.9.3 will
     be used :cite:`humphrey1996vmd`. Some basic instructions for VMD are given here in the
-    :ref:`vmd-label`. If you prefer, feel free to use an alternative visualization
+    :ref:`vmd-label`. Feel free to use an alternative visualization
     software like |Ovito|.
 
 .. |VMD| raw:: html