Fix minor diffs between Guidebook.mn and .tex

doc/Guidebook.mn

@@ -4142,6 +4142,7 @@ released 3.6.1 as a bug fix release in January 2016.
 .pg
 The official NetHack web site is maintained by \fBKen Lorber\fP at http://www.nethack.org/.
 .pg
+.hn 2
 SHOUT-OUTS
 .pg
 The devteam would like to give a special "shout-out" to thank the generous

doc/Guidebook.tex

@@ -1674,6 +1674,7 @@ complete all of the levels according to the traditional rules of
 Sokoban.  Some allowances are permitted in case the player gets stuck;
 however, they will lower your luck.
 
+%.hn 2
 \subsection*{Stairs (`{\tt <}', `{\tt >}')}
 
 %.pg
@@ -1707,6 +1708,7 @@ you travel up or down stairs, and occasionally one of these creatures
 will displace you during the climb.  When that occurs, the pet or other
 monster will arrive on the staircase and you will end up nearby.
 
+%.hn 2
 \subsection*{Ladders (`{\tt <}', `{\tt >}')}
 
 %.pg