Update Doku aus Driversourcen

Change-Id: I455f0813b970151089b3dc1b8d9407eea323cdd1
diff --git a/doc/master/prepare_destruct b/doc/master/prepare_destruct
index 3121b88..f24391f 100644
--- a/doc/master/prepare_destruct
+++ b/doc/master/prepare_destruct
@@ -1,22 +1,31 @@
 SYNOPSIS
-	mixed prepare_destruct(object obj)
+        mixed prepare_destruct(object obj)
 
 DESCRIPTION
-	Prepare the destruction of the object obj. Return 0 if the
-	object is ready for destruction, any other value will abort
-	the attempt. If a string is returned, an error with the string
-	as message will be issued.
+        Prepare the destruction of the object obj. Return 0 if the
+        object is ready for destruction; any other value will abort
+        the attempt. If a string is returned, an error with the string
+        as message will be issued.
 
-	The interpreter calls this function whenever an object shall
-	be destructed. It expects, that this function cleans the
-	inventory of the object, or the destruct will fail.
-	Furthermore, the function could notify the former inventory
-	objects that their holder is under destruction (useful to move
-	users out of rooms which re updated); and it could announce
-	systemwide the destruction(quitting) of users.
+        The interpreter calls this function whenever an object shall
+        be destructed. It expects that this function cleans the
+        inventory of the object, or the destruct will fail. It is also
+        recommended to clean up all shadows on obj at this point.
 
-	Strange things will happen if the mastor object does not
-	provide this function.
+        Furthermore, the function could notify the former inventory
+        objects that their holder is under destruction (useful to move
+        users out of rooms which are updated); and it could announce
+        systemwide the destruction(quitting) of users.
+
+        Another use for this apply is to take care of any other
+        'cleanup' work needed to be done, like adjusting weights,
+        light levels, and such. Alternatively and traditionally this
+        is done by calling an lfun 'remove()' in the object, which
+        then calls the efun destruct() after performing all the
+        adjustments.
+
+        Strange things will happen if the master object does not
+        provide this function.
 
 SEE ALSO
-	remove_player(M), destruct(E)
+        remove_player(M), destruct(E)