fix typo in https://trac.osgeo.org/grass/changeset/72315

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@72316 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/python/pygrass/raster/__init__.py

@@ -53,7 +53,7 @@ class RasterRow(RasterAbstractBase):
         * No mathematical operation like __add__ and stuff for the Raster
           object (only for rows), since r.mapcalc is more sophisticated and
           faster
-        * Rises IndexError if [row] is out of range
+        * Raises IndexError if [row] is out of range
 
         Examples: