/// \class AliTPCCombinedTrackfit
/// \brief Combine cosmic track pairs (upper, lower) and do track fitting.
-///
+///
/// Usage
/// -----
///
/// const Bool_t kfit = fCombinedTrackfit->CombineESDtracks(esdtrack0, esdtrack1);
///
/// //status = 0 for good fit (i.e. kfit=kTRUE), non-0 for bad fit (i.e. kfit=kFALSE), see "enum CombineStatus" definition in header file
-/// const Int_t status = fCombinedTrackfit->GetStatus();
+/// const Int_t status = fCombinedTrackfit->GetStatus();
///
-/// //in Analysis Task write when terminate
+/// //in Analysis Task write when terminate
/// fCombinedTrackfit->GetStreamer()->GetFile()->Write();
/// ~~~
///
/// "icup.="<<&fInnerClusterUp<< //TVector3 position of the innermost cluster of the upper track
/// "iclow.="<<&fInnerClusterLow<<
/// "leverarm="<<fLeverArm<<
-/// "ncl="<<fFitNcls<< //number of clusters used in successful propagation
+/// "ncl="<<fFitNcls<< //number of clusters used in successful propagation
/// "nmiss="<<fMissNcls<< //number of clusters failed in propagation, should always be 0 in this case.
-/// "chi2="<<fPreChi2<< //chi2/nfit
+/// "chi2="<<fPreChi2<< //chi2/nfit
/// "momup="<< momup << //momentum at uppermost cluster with upward propagation
/// "momlow="<< momlow << //momentum at lowermost cluster with downward propagation
/// "ptup="<< ptup <<
/// ----------
///
/// For 2011 Feb. cosmic data nch=2 events, the kfit and status look like:
-///
+///
/// ~~~{.cxx}
/// kfit,status ( 0, 1): 68939 / 2611959 = 2.639% //kFailGetTPCseeds
/// kfit,status ( 0, 2): 14886 / 2611959 = 0.570% //not both tracks have ncl > AliTPCCosmicUtils::fgkNclsMin
/// kfit,status ( 0, 7): 19994 / 2611959 = 0.765% //chi2/nfit > fgkMaxChi2
/// kfit,status ( 1, 0): 2402181 / 2611959 = 91.969% //i.e. 92% of nch=2 events are successfully fitted.
/// ~~~
-///
+///
/// Resolution
/// ----------
///