STYLE: use new argList argRead() method and operator[] for cleaner code.

- deprecate argList::additionalArgs() method and remove uses of it

applications/utilities/mesh/conversion/foamToSurface/foamToSurface.C

@@ -73,14 +73,12 @@ int main(int argc, char *argv[])
 
 #   include "setRootCase.H"
 
-    const stringList& params = args.additionalArgs();
+    fileName exportName = args[1];
 
     scalar scaleFactor = 0;
     args.optionReadIfPresent<scalar>("scale", scaleFactor);
     const bool doTriangulate = args.optionFound("tri");
 
-    fileName exportName(params[0]);
-
     fileName exportBase = exportName.lessExt();
     word exportExt = exportName.ext();