Fix cpplint "readability" or whatever.

Author: jaelpark

PWGCF/Tasks/correlations.cxx

@@ -387,12 +387,14 @@ struct CorrelationTask {
 
         // last param is the weight
         if (cfgMassAxis) {
-          if constexpr (std::experimental::is_detected<hasInvMass, typename TTracks1::iterator>::value)
+          if constexpr (std::experimental::is_detected<hasInvMass, typename TTracks1::iterator>::value) {
             target->getPairHist()->Fill(step, track1.eta() - track2.eta(), track2.pt(), track1.pt(), multiplicity, deltaPhi, posZ, track1.invMass(), associatedWeight);
-          else
+          } else {
             LOGF(fatal, "Can not fill mass axis without invMass column. Disable cfgMassAxis.");
-        } else
+          }
+        } else {
           target->getPairHist()->Fill(step, track1.eta() - track2.eta(), track2.pt(), track1.pt(), multiplicity, deltaPhi, posZ, associatedWeight);
+        }
       }
     }
   }