update help

pert

     _echo "Comma separated task list in the form \"1,2,12 4,5,9 2,3,6\", where whitespace separates tasks."
     _echo ""
     _echoB "Usage:"
-    _echo "\tpert.sh [optimistic,realistic,pessimistic]"
+    _echo "\tpert [optimistic,realistic,pessimistic]"
     _echo ""
     _echoB "Example:"
-    _echo "\tpert.sh 1,3,4"
-    _echo "\tpert.sh 10,15,20 5,7,10"
-    _echo "\tpert.sh \"1,2,3\" \"15,17,20\""
+    _echo "\tpert 1,3,4"
+    _echo "\tpert 10,15,20 5,7,10"
+    _echo "\tpert \"1,2,3\" \"15,17,20\""
     _echo ""
 }
 
     pert_table $@
     exit 0
     ;;
-esac
+esac