STYLE: Comment fix.

src/postProcessing/functionObjects/field/streamLine/streamLineParticle.C

@@ -51,7 +51,7 @@ Foam::scalar Foam::streamLineParticle::calcSubCycleDeltaT
     scalar fraction = testParticle.trackToFace(position()+dt*U, td);
     td.keepParticle = oldKeepParticle;
     td.switchProcessor = oldSwitchProcessor;
-    // Adapt the dt to subdivide the trajectory into 4 substeps.
+    // Adapt the dt to subdivide the trajectory into substeps.
     return dt*fraction/td.nSubCycle_;
 }