Fix spelling and capitalization issues in dat and DEVEL.

dat/quest.txt

@@ -1668,7 +1668,7 @@ to %ns lair.  If you can manage to defeat %n and return
 undead that befoul the land.
 
 "Go with %d as your guide, %p."
-%E [%nC invaded %H and captured %o.  Defeat %ni and retrive %oh.]
+%E [%nC invaded %H and captured %o.  Defeat %ni and retrieve %oh.]
 %Cp Pri 00025
 "You can prevail, if you rely on %d."
 %E
@@ -2056,7 +2056,7 @@ the Amulet."
 %E [You have succeeded.  Take %o with you as you go to find the Amulet.]
 # assumes The Longbow of Diana
 %Cc Ran 00082
-%l flexs %o reverently.
+%l flexes %o reverently.
 
 "With this wondrous bow, one need never run out of arrows.
 You are its keeper now, and the time has come to resume your
@@ -2967,7 +2967,7 @@ The ice and snow gives way to a valley floor.  You %x ahead of you
 a huge round hill surrounded by pools of lava.  This then is the entrance
 to %i.  It looks like you're not going to get in without
 a fight though.
-%E [This is the entrace to %i.]
+%E [This is the entrance to %i.]
 %Cp Val 00036
 Once again, you stand before the entrance to %i.
 %E