Merge pull request #6737 from yingyil06/test

Fixed a typo

Author: MFraters

source/geometry_model/chunk.cc

@@ -944,8 +944,8 @@ namespace aspect
                                    "The dimensions of the model are specified by parameters "
                                    "of the following form: "
                                    "Chunk (minimum || maximum) (longitude || latitude): "
-                                   "edges of geographical quadrangle (in degrees)"
-                                   "Chunk (inner || outer) radius: Radii at bottom and top of chunk"
+                                   "edges of geographical quadrangle (in degrees) "
+                                   "Chunk (inner || outer) radius: Radii at bottom and top of chunk "
                                    "(Longitude || Latitude || Radius) repetitions: "
                                    "number of cells in each coordinate direction."
                                    "\n\n"