Fix spelling.

git-svn-id: https://svn.dealii.org/trunk@9173 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/doc/doxygen/headers/lac/dox.h b/deal.II/doc/doxygen/headers/lac/dox.h
index 403ca39e4d2a320e57af2f24a9060ee725d9d530..fb2181072f28fef6728b2ba567c3ce3fcd09637b 100644 (file)
--- a/deal.II/doc/doxygen/headers/lac/dox.h
+++ b/deal.II/doc/doxygen/headers/lac/dox.h
@@ -99,9 +99,13 @@
 /**
  * @defgroup PETSc PETSc
  * The classes in this module are wrappers around functionality provided by
- * the PETSc library. THe provide a modern object-oriented interface that is
+ * the PETSc library. They provide a modern object-oriented interface that is
  * compatible with the interfaces of the other linear algebra classes in
  * deal.II.
  *
+ * These classes are only available if a PETSc installation was detected
+ * during configuration of deal.II. Refer to the README file for more details
+ * about this.
+ *
  * @author Wolfgang Bangerth, 2004
  */