doxyfile BUGFIX older doxygen skips spaces when not in quotes
diff --git a/Doxyfile.in b/Doxyfile.in
index 9c84905..6ac2071 100644
--- a/Doxyfile.in
+++ b/Doxyfile.in
@@ -44,7 +44,7 @@
 # for a project that appears at the top of each page and should give viewer a
 # quick idea about the purpose of the project. Keep the description short.
 
-PROJECT_BRIEF          = @PROJECT_DESCRIPTION@
+PROJECT_BRIEF          = "@PROJECT_DESCRIPTION@"
 
 # With the PROJECT_LOGO tag one can specify a logo or an icon that is included
 # in the documentation. The maximum height of the logo should not exceed 55