[handbook] cleanup

doc/handbook/5_grids.tex

@@ -17,7 +17,7 @@ of the DGF format and some examples can be found in the \Dune doxygen documentat
 complex DGF files, we recommend to write your own scripts, e.g in \Cplusplus, Matlab or Python.
 
 The DGF format can also used to read in spatial parameters defined on the grid. These parameters can
-be defined on nodes as well as on the elements. An example for predefined parameters on a grid 
+be defined on nodes as well as on the elements. An example for predefined parameters on a grid
 can be found in the  \texttt{dumux/test/porousmediumflow/co2/implicit/} folder.
 
 \subsubsection{Gmsh Mesh Format}