From dc97c99cc0f61f024d47c1ac002606995a2a5630 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Sun, 19 Mar 2017 15:28:08 -0600
Subject: [PATCH] Improve the wording of an exception.

---
 include/deal.II/grid/grid_generator.h | 2 +-
 source/grid/grid_generator.cc         | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/include/deal.II/grid/grid_generator.h b/include/deal.II/grid/grid_generator.h
index c01be97c84..f3f33995f1 100644
--- a/include/deal.II/grid/grid_generator.h
+++ b/include/deal.II/grid/grid_generator.h
@@ -1207,7 +1207,7 @@ namespace GridGenerator
   DeclException1 (ExcInvalidRepetitionsDimension,
                   int,
                   << "The vector of repetitions  must have "
-                  << arg1 <<" elements.");
+                  << arg1 << " elements.");
 
   /**
    * Exception for input that is not properly oriented.
diff --git a/source/grid/grid_generator.cc b/source/grid/grid_generator.cc
index 663bfacb52..18bf421b30 100644
--- a/source/grid/grid_generator.cc
+++ b/source/grid/grid_generator.cc
@@ -1,6 +1,6 @@
 // ---------------------------------------------------------------------
 //
-// Copyright (C) 1999 - 2016 by the deal.II authors
+// Copyright (C) 1999 - 2017 by the deal.II authors
 //
 // This file is part of the deal.II library.
 //
@@ -1310,7 +1310,10 @@ namespace GridGenerator
         for (unsigned int j=0; j<step_sizes.at(i).size(); j++)
           x += step_sizes[i][j];
         Assert(std::fabs(x - (p2(i)-p1(i))) <= 1e-12*std::fabs(x),
-               ExcInvalidRepetitions (i) );
+               ExcMessage ("The sequence of step sizes in coordinate direction " +
+                           Utilities::int_to_string(i) +
+                           " must be equal to the distance of the two given "
+                           "points in this coordinate direction."));
       }
 
 
-- 
2.39.5