Fix documentation of extend + spelling.

diff --git a/include/deal.II/base/bounding_box.h b/include/deal.II/base/bounding_box.h
index 97acdb873d786ea516b3fd0dff424b99b5030ae8..bfb85c5e79ee2dbc5d58c5aa22187436c02ed2f3 100644 (file)
--- a/include/deal.II/base/bounding_box.h
+++ b/include/deal.II/base/bounding_box.h
@@ -141,7 +141,8 @@ public:
   point_inside(const Point<spacedim, Number> &p) const;
 
   /**
-   * Increase (or decrease) the size of the bounding box by the given amount.
+   * Increase (or decrease) the size of the bounding box by the given amount,
+   * in both directions in all coordinate directions.
    *
    * If you call this method with a negative number, and one of the axes of the
    * original bounding box is smaller than amount/2, the method will trigger
@@ -195,7 +196,7 @@ BoundingBox<spacedim, Number>::extend(const Number &amount)
       boundary_points.first[d] -= amount;
       boundary_points.second[d] += amount;
       Assert(boundary_points.first[d] <= boundary_points.second[d],
-             ExcMessage("Bounding Box can't be shrinked this much: the points' "
+             ExcMessage("Bounding Box can't be shrunk this much: the points' "
                         "order should remain bottom left, top right."));
     }
 }