controlDict: the optional graphFormat entry is now used as the default for all setFormat entries

Foam::graph superseded by the more general Foam::setWriter reducing code
maintenance overhead, simplifying usage and further development.

applications/utilities/preProcessing/boxTurb/boxTurb.C

@@ -32,11 +32,10 @@ Description
 
 #include "argList.H"
 #include "volFields.H"
-#include "graph.H"
 #include "OFstream.H"
 #include "Kmesh.H"
 #include "turbGen.H"
-#include "calcEk.H"
+#include "writeEk.H"
 #include "writeFile.H"
 
 using namespace Foam;
@@ -70,15 +69,7 @@ int main(int argc, char *argv[])
 
     U.write();
 
-    calcEk(U, K).write
-    (
-        runTime.path()
-       /functionObjects::writeFile::outputPrefix
-       /"graphs"
-       /runTime.name(),
-        "Ek",
-        runTime.graphFormat()
-    );
+    writeEk(U, K);
 
     Info<< "end" << endl;