Put in line the time-resolution output of single-histogram and asymmetry data.

Now both have a line break at the end--before this has only been true for the asymmetry data.
(If the line break is not needed it should be consistently removed and replaced by a cout.flush()
followed by a line break when musrview is terminated.)

src/classes/PRunMuMinus.cpp

@@ -151,7 +151,7 @@ Bool_t PRunMuMinus::PrepareData()
 {
   Bool_t success = true;
 
-  cout << endl << "in PRunMuMinus::PrepareData(): will feed fData";
+  cout << endl << "in PRunMuMinus::PrepareData(): will feed fData" << endl;
 
   return success;
 }