update doc

Readme.rst

@@ -1872,8 +1872,8 @@ Internals: the thoughts are set to be very old, so that the game remove them
 quickly after you unpause.
 
 
-slayrace
+exterminate
-========
+===========
 Kills any unit of a given race.
 
 With no argument, lists the available races and count eligible targets.
@@ -1896,15 +1896,15 @@ Will target any unit on a revealed tile of the map, including ambushers.
 
 Ex::
 
-    slayrace gob
+    exterminate gob
 
 To kill a single creature, select the unit with the 'v' cursor and::
 
-    slayrace him
+    exterminate him
 
 To purify all elves on the map with fire (may have side-effects)::
 
-    slayrace elve magma
+    exterminate elve magma
 
 
 magmasource
@@ -1926,6 +1926,13 @@ To remove all placed sources, call ``magmasource stop``.
 
 With no argument, this command shows an help message and list existing sources.
 
+masspit
+=======
+Designate all creatures in cages on top of a pit/pond activity zone for pitting.
+Works best with an animal stockpile on top of the zone.
+
+Works with a zone number as argument (eg ``Activity Zone #6`` -> ``masspit 6``)
+or with the game cursor on top of the area.
 
 digfort
 =======

scripts/exterminate.rb

@@ -67,7 +67,7 @@ The targets will bleed out on the next game tick, or if they are immune to that,
 The special final argument 'magma' will make magma rain on the targets instead.
 
 Ex: exterminate gob
-    exterminate elf magma
+    exterminate elve magma
     exterminate him
 EOS