remove whitespaces.

dune/fem-dg/assemble/primalmatrix.hh

dune/fem-dg/main/caching.hh

dune/fem-dg/main/codegen2.hh

dune/fem-dg/main/default.hh

dune/fem-dg/main/main.cc

dune/fem-dg/main/main_0.cc

dune/fem-dg/main/vectorialbasefunctionset.hh

dune/fem-dg/misc/cons2prim.hh

dune/fem-dg/misc/crs.hh

dune/fem-dg/misc/dgnorm.hh

dune/fem-dg/misc/diagnostics.hh

dune/fem-dg/models/defaultmodel.hh

dune/fem-dg/models/defaultprobleminterfaces.hh

dune/fem-dg/operator/adaptation/adaptation.cc

dune/fem-dg/operator/adaptation/estimator.hh

dune/fem-dg/operator/adaptation/estimatorbase.hh

dune/fem-dg/operator/adaptation/utility.hh

dune/fem-dg/operator/dg/discretemodelcommon.hh

dune/fem-dg/operator/dg/fluxdiscretemodel.hh

dune/fem-dg/operator/dg/fluxoperator.hh