[Cleanup] Clarify scaling of initialState

src/one-body-sample.parset

@@ -21,7 +21,7 @@ a            = 0.010
 b            = 0.015
 V0           = 1e-6
 L            = 1e-5
-initialState = 4.54e-05 # exp(-10)
+initialState = 4.54e-05 # = exp(-10) = theta, so that alpha = -10
 stateModel   = Dieterich
 
 [timeSteps]