[clang] Fix namespace formatting

Author: kostorr

CMakeLists.txt

@@ -15,7 +15,7 @@ endif()
 project(ReadoutCard
   VERSION 0.31.0
   DESCRIPTION "O2 ReadoutCard library"
-  LANGUAGES CXX
+  LANGUAGES C CXX
 )
 
 # Documentation dir

include/ReadoutCard/NamespaceAlias.h

@@ -18,10 +18,13 @@
 
 // "fake" namespace forward decalaration so that
 // the `using` directive can find the namespace
-namespace o2 {}
+namespace o2
+{
+}
 
-namespace AliceO2 {
-  using namespace o2;
+namespace AliceO2
+{
+using namespace o2;
 }
 
 #endif // O2_READOUTCARD_NAMESPACE_ALIAS_H_