Change "cat" to "edit" in error message from prism-auto/prism-test.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@8666 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/etc/scripts/prism-auto

@@ -228,7 +228,7 @@ def runPrism(args, dir=""):
 			if re.match('Error:', line):
 				print line,
 		print "To see log file, run:"
-		print "cat " + logFile
+		print "edit " + logFile
 		if not options.testAll:
 			sys.exit(1)