src/sage/plot/plot3d/list_plot3d.py: Fix doc markup

Author: Matthias Koeppe

src/sage/plot/plot3d/list_plot3d.py

@@ -530,8 +530,7 @@ def list_plot3d_tuples(v, interpolation_type, **kwds):
 
     .. PLOT::
 
-        sphinx_plot(list_plot3d([[1, 1, 1], [1, 2, 1], [0, 1, 3], [1, 0, 4]],
-        ....:                   point_list=True))
+        sphinx_plot(list_plot3d([[1, 1, 1], [1, 2, 1], [0, 1, 3], [1, 0, 4]], point_list=True))
 
     ::