Fix formatting.

When collating the introduction of step-60 to the commented program
section, the lack of an extra newline means that the heading
'The commented program' is treated like an entry in the enumerated
list that's at the end of the introduction. Fix this by providing
an additional newline.

diff --git a/examples/step-60/doc/intro.dox b/examples/step-60/doc/intro.dox
index 5b93ef3152f0ea63fa1be62bd173f3b202305d7b..0623c7a30a03aed67f4ea09793ab4c348601f1d6 100644 (file)
--- a/examples/step-60/doc/intro.dox
+++ b/examples/step-60/doc/intro.dox
@@ -329,3 +329,4 @@ $\Omega$.
 - Heltai, L., and F. Costanzo. 2012. “Variational Implementation of Immersed
   Finite Element Methods.” Computer Methods in Applied Mechanics and Engineering
   229–232.
+