Fix misspelling of HTML code.

git-svn-id: https://svn.dealii.org/trunk@30240 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-23/doc/intro.dox b/deal.II/examples/step-23/doc/intro.dox
index c7b70487afc512ae3ba84566e334fd4d653785af..88610b47f7c9c12946b8f750bd31496583d478ba 100644 (file)
--- a/deal.II/examples/step-23/doc/intro.dox
+++ b/deal.II/examples/step-23/doc/intro.dox
@@ -84,7 +84,7 @@ other time dependent problems, we find that the character of a
 solution changes as time progresses. For example, for the wave
 equation, we may have a single wave travelling through the domain,
 where the solution is smooth or even constant in front of and behind
-the wave &mdash& adaptivity would be really useful for such cases, but the
+the wave — adaptivity would be really useful for such cases, but the
 key is that the area where we need to refine the mesh changes from
 time step to time step!