Fairness descriptions in help info.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@867 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/prism/PrismCL.java

@@ -1561,8 +1561,8 @@ public class PrismCL
 		mainLog.println("-extraddinfo ................... Display extra info about some (MT)BDDs");
 		mainLog.println("-extrareachinfo ................ Display extra info about progress of reachability");
 		mainLog.println("-nopre ......................... Skip precomputation algorithms");
-		mainLog.println("-fair .......................... Use fairness (when model checking MDPs)");
-		mainLog.println("-nofair ........................ Don't use fairness (when model checking MDPs) [default]");
+		mainLog.println("-fair .......................... Use fairness (for probabilistic reachability in MDPs)");
+		mainLog.println("-nofair ........................ Don't use fairness (for probabilistic reachability in MDPs) [default]");
 		mainLog.println("-fixdl ......................... Automatically put self-loops in deadlock states");
 		mainLog.println("-nocompact ..................... Switch off \"compact\" sparse storage schemes");
 		mainLog.println("-noprobchecks .................. Disable checks on model probabilities/rates");

prism/src/prism/PrismSettings.java

@@ -168,7 +168,7 @@ public class PrismSettings implements Observer
 			//====================================================================================================================================================================================================================================================================================================================================
 			{ CHOICE_TYPE,		PRISM_ENGINE,							"Engine",								"3.0",			"Hybrid",																	"MTBDD,Sparse,Hybrid",																		"Which engine (hybrid, sparse or MTBDD) should be used for model checking." },
 			{ BOOLEAN_TYPE,		PRISM_VERBOSE,							"Verbose output",						"3.0",			new Boolean(false),															"",																							"Display verbose output to log." },
-			{ BOOLEAN_TYPE,		PRISM_FAIRNESS,							"Use fairness",							"3.0",			new Boolean(false),															"",																							"Constrain to fair adversaries when model checking MDPs." },
+			{ BOOLEAN_TYPE,		PRISM_FAIRNESS,							"Use fairness",							"3.0",			new Boolean(false),															"",																							"Constrain to fair adversaries when model checking probabilistic reachability properties of MDPs." },
 			{ BOOLEAN_TYPE,		PRISM_PRECOMPUTATION,					"Use precomputation",					"3.0",			new Boolean(true),															"",																							"Use model checking precomputation algorithms (Prob0, Prob1, etc.)." },
 			{ BOOLEAN_TYPE,		PRISM_DO_PROB_CHECKS,					"Do probability/rate checks",					"3.0",			new Boolean(true),															"",																							"Perform sanity checks on model probabilities/rates when constructing probabilistic models." },
 			{ BOOLEAN_TYPE,		PRISM_COMPACT,							"Use compact schemes",					"3.0",			new Boolean(true),															"",																							"Use additional optimisations for compressing sparse matrices and vectors with repeated values." },