Added *vtk *out in make clean

git-svn-id: https://svn.dealii.org/trunk@15747 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-31/Makefile b/deal.II/examples/step-31/Makefile
index 26266ada331a8bbf72bb941fd6197127304594e0..f8acda44c331be36bd06953c79658f1590dba3ec 100644 (file)
--- a/deal.II/examples/step-31/Makefile
+++ b/deal.II/examples/step-31/Makefile
@@ -30,7 +30,7 @@ D = ../../
 # shall be deleted when calling `make clean'. Object and backup files,
 # executables and the like are removed anyway. Here, we give a list of
 # files in the various output formats that deal.II supports.
-clean-up-files = *gmv *gnuplot *gpl *eps *pov
+clean-up-files = *gmv *gnuplot *gpl *eps *pov *vtk *out