Use a way to reference labels that will not lead to them being escaped.

git-svn-id: https://svn.dealii.org/trunk@24277 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-18/doc/intro.dox b/deal.II/examples/step-18/doc/intro.dox
index d912f3b072d5752127061b3e8c9cf5d16a665913..55b7f40f231276c712d8c711676cf479220782dd 100644 (file)
--- a/deal.II/examples/step-18/doc/intro.dox
+++ b/deal.II/examples/step-18/doc/intro.dox
@@ -122,7 +122,7 @@ changes with time, with the boundary moving according to the
 displacements $\mathbf{u}(\mathbf{x},t)$ of the points on the boundary. To
 complete this system, we have to specify the incremental relationship between
 the stress and the strain, as follows:
-<a name="step-18.stress-strain"></a>
+<a name="step_18.stress-strain"></a>
 @f[
   \dot\sigma = C \varepsilon (\dot{\mathbf{u}}),
   \qquad
@@ -166,7 +166,7 @@ The weak form of this set of equations, which as usual is the basis for the
 finite element formulation, reads as follows: find $\Delta \mathbf{u}^n \in
 \{v\in H^1(\Omega(t_{n-1}))^d: v|_{\Gamma_D}=\mathbf{d}(\cdot,t_n) - \mathbf{d}(\cdot,t_{n-1})\}$
 such that
-<a name="step-18.linear-system"></a>
+<a name="step_18.linear-system"></a>
 @f{eqnarray*}
   (C \varepsilon(\Delta\mathbf{u}^n), \varepsilon(\varphi) )_{\Omega(t_{n-1})}
   =
@@ -219,7 +219,7 @@ complicated and will be discussed in the next section.
 
 As indicated above, we need to have the stress variable $\sigma^n$ available
 when computing time step $n+1$, and we can compute it using
-<a name="step-18.stress-update"></a>
+<a name="step_18.stress-update"></a>
 @f[
   \sigma^n = \sigma^{n-1} + C \varepsilon (\Delta \mathbf{u}^n).
   \qquad
@@ -290,7 +290,7 @@ the increment describe translations, its divergence the dilational modes, and
 the curl the rotational modes). Since the exact form of $R$ is cumbersome, we
 only state it in the program code, and note that the correct updating formula
 for the stress variable is then
-<a name="step-18.stress-update+rot"></a>
+<a name="step_18.stress-update+rot"></a>
 @f[
   \sigma^n
   =
@@ -394,7 +394,7 @@ sequence of operations on the present mesh:
 <li> <code>assemble_system ()</code> [via <code>solve_timestep ()</code>]:
   This first function is also the most interesting one. It assembles the
   linear system corresponding to the discretized version of equation
-  <a href="#step-18.linear-system">[linear-system]</a>. This leads to a system matrix $A_{ij} = \sum_K
+  <a href="#step_18.linear-system">[linear-system]</a>. This leads to a system matrix $A_{ij} = \sum_K
   A^K_{ij}$ built up of local contributions on each cell $K$ with entries
   @f[
     A^K_{ij} = (C \varepsilon(\varphi_j), \varepsilon(\varphi_i))_K;
@@ -477,7 +477,7 @@ for (unsigned int i=0; i<dofs_per_cell; ++i)
         \sigma^{n-1}_q : \varepsilon(\varphi_i(\mathbf{x}_q))
       \right\}
   @f}
-  to the right hand side of <a href="#step-18.linear-system">[linear-system]</a> is equally
+  to the right hand side of <a href="#step_18.linear-system">[linear-system]</a> is equally
   straightforward (note that we do not consider any boundary tractions $\mathbf{b}$ here). Remember that we only had to store the old stress in the
   quadrature points of cells. In the program, we will provide a variable
   <code>local_quadrature_points_data</code> that allows to access the stress
@@ -524,7 +524,7 @@ for (unsigned int i=0; i<dofs_per_cell; ++i)
 
 <li> <code>update_quadrature_point_history ()</code> [via
   <code>solve_timestep ()</code>]: Based on the displacement field $\Delta \mathbf{u}^n$ computed before, we update the stress values in all quadrature points
-  according to <a href="#step-18.stress-update">[stress-update]</a> and <a href="#step-18.stress-update+rot">[stress-update+rot]</a>,
+  according to <a href="#step_18.stress-update">[stress-update]</a> and <a href="#step_18.stress-update+rot">[stress-update+rot]</a>,
   including the rotation of the coordinate system.
 
 <li> <code>move_mesh ()</code>: Given the solution computed before, in this