fix "mysterious force" probabilities in do.c comment

Reported by Alex, the probabilites shown in the comment about the effect
of the mysterious force have been wrong ever since they were added 20 or
so years ago.  Lawfuls and neutrals are much more likely to go down just
one level rather than 2 or 3.

diff --git a/src/do.c b/src/do.c
index 34635af720810f506edecad4c932561dbd2dc2ce..b387752d64a1b5566b4fd9eef9e27274a439806e 100644 (file)
--- a/src/do.c
+++ b/src/do.c
@@ -1,4 +1,4 @@
-/* NetHack 3.5 do.c    $NHDT-Date: 1426497723 2015/03/16 09:22:03 $  $NHDT-Branch: H3724 $:$NHDT-Revision: 1.109 $ */
+/* NetHack 3.5 do.c    $NHDT-Date: 1426991040 2015/03/22 02:24:00 $  $NHDT-Branch: master $:$NHDT-Revision: 1.111 $ */
 /* NetHack 3.5 do.c    $Date: 2014/11/18 03:10:39 $  $Revision: 1.101 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -1014,15 +1014,18 @@ boolean at_stairs, falling, portal;
 
        /* If you have the amulet and are trying to get out of Gehennom, going
         * up a set of stairs sometimes does some very strange things!
-        * Biased against law and towards chaos, but not nearly as strongly
-        * as it used to be (prior to 3.2.0).
-        * Odds:            old                             new
-        *      "up"    L      N      C         "up"    L      N      C
-        *       +1   75.0   75.0   75.0         +1   75.0   75.0   75.0
-        *        0    0.0   12.5   25.0          0    6.25   8.33  12.5
-        *       -1    8.33   4.17   0.0         -1    6.25   8.33  12.5
-        *       -2    8.33   4.17   0.0         -2    6.25   8.33   0.0
-        *       -3    8.33   4.17   0.0         -3    6.25   0.0    0.0
+        * Biased against law and towards chaos. (The chance to be sent
+        * down multiple levels when attempting to go up are significantly
+        * less than the corresponding comment in older versions indicated
+        * due to overlooking the effect of the call to assign_rnd_lvl().)
+        *
+        * Odds for making it to the next level up, or of being sent down:
+        *      "up"    L      N      C
+        *       +1   75.0   75.0   75.0
+        *        0    6.25   8.33  12.5
+        *       -1   11.46  12.50  12.5
+        *       -2    5.21   4.17   0.0
+        *       -3    2.08   0.0    0.0
         */
        if (Inhell && up && u.uhave.amulet && !newdungeon && !portal &&
                                (dunlev(&u.uz) < dunlevs_in_dungeon(&u.uz)-3)) {