potions of gain energy

When doing some more reformatting I came across something I've been
meaning to tweak for a long time, and since the change is only a couple
of lines I'm putting it in now instead of waiting.  Make potions of
gain energy more useful for actually regaining energy so they might not
be relegated to alchemy all the time.  The adjustment is probably too
low to really achieve that, but I didn't want to risk going too high.

Increase to max energy is only a little higher (average 10.5 vs 9 for
blessed, 7 vs 4 for uncursed) but to current energy is noticeably higher
(31.5 vs 9 for blessed, 21 vs 4 for uncursed; capped by max energy so
bigger increase only matters if current is below max when quaffing).

doc/fixes36.0

@@ -931,6 +931,7 @@ remaining monsters continued to move after hero conceptually left the level
 	it be feasible--but not practical--to level teleport with the Amulet)
 #turn for non-priest/non-knight attempts to cast "turn undead" spell, but
 	was forcing the spell to target self rather than choose a direction
+potions of gain energy are more useful for recovering hero's spell energy
 
 
 Platform- and/or Interface-Specific Fixes
@@ -972,16 +973,17 @@ Windows, probably MSDOS and OS/2: attempting to use very first false rumor
 	of waiting until hero's next move
 winCE: disable processing of double-click messages if the first click
 	causes map to scroll
-winCE: help text windows close immediately after open (unhandled WM_KEYDOWN in mhtext.c)
+winCE: help text windows close immediately after open (unhandled WM_KEYDOWN
+	in mhtext.c)
 winCE: correct coordinates used by action button
 winCE: wrap/unwrap text option for text windows
 winCE: hardware keyboard detection
 winCE: hide keypad when hardware keyboard is present
 winCE: backport message window highlighting from winnt port
 winCE: new icon with recommended image sizes
 pocketpc: menu window closes on up/down keys from first/last position
-win32gui: better handling of "more" prompt for messages that would have scrolled
-	off the window
+win32gui: better handling of "more" prompt for messages that would have
+	scrolled off the window
 win32gui: set correct checkmark on "Lock Windows" menu item on startup
 win32gui: redraw message window on resizing (it does not update properly otherwise)
 win32gui: fixed copy/paste error in read registry settings function
@@ -991,9 +993,9 @@ win32gui: made auto-arrange windows on/off option (it was reset automatically
 win32gui: fix a possible crash with AltGr-4 WM_KEYDOWN handling
 win32gui: use whatever alternate tile set is loaded in the menus
 win32tty: prevent early error messages from flashing by too fast and not seen
-win32tty: work around problem where display symbols were wrong or unrecognizable
-	on systems where the default language for non-Unicode programs was not 
-	set to "US English" - courtesy Ray Chason
+win32tty: work around problem where display symbols were wrong or
+	unrecognizable on systems where the default language for non-Unicode
+	programs was not set to "US English" - courtesy Ray Chason
 win32tty: work around problem where some characters did not show up if the
 	console code page was other than 437
 X11: support dynamic switching of map mode via tiled_map option
@@ -1044,12 +1046,12 @@ debug-mode viewing of fully identified object descriptions without
 	actually identifying the objects
 health-food store that stocks monk-appropriate foods in mine town when monk
 give more information about your attributes in debug mode
-polywarn to give intrinsic monster detection of limited species while polymorphed
-rocks can skip on the water sometimes allowing them to pass over water creatures
-vampires can now shapeshift into bats and fog clouds; the latter can be done at 
-	will to slip through locked doors
-shapeshifted vampire will transform back to vampire form after you defeat it and
-	continue to fight in its native form
+polywarn to give intrinsic monster detection of limited species while poly'd
+rocks can skip on water sometimes allowing them to pass over water creatures
+vampires can now shapeshift into bats and fog clouds; the latter can be done
+	at will to slip through locked doors
+shapeshifted vampire will transform back to vampire form after you defeat it
+	and continue to fight in its native form
 container lknown flag for locked/unlocked/broken awareness
 container cknown flag for container content awareness
 plname is stored in the save file on all platforms now
@@ -1075,7 +1077,7 @@ add atmospheric sound messages for temples
 sometimes give announcement message when monsters teleport to hero's vicinity
 obsolete config file keywords: GRAPHICS, OBJECTS, TRAPS, EFFECTS
 deprecated options: IBMGraphics, DECGraphics, boulder
-new options: symset, roguesymset for choosing a symbol set from the symbols file
+new options: symset, roguesymset for choosing a symbol set from  symbols file
 new config file keyword: SYMBOLS for overriding character symbol values by name
 opening magic frees from bear traps and webs, activates trap doors
 closing magic activates bear traps and webs
@@ -1153,9 +1155,9 @@ options to create the character blind or nudist
 moving clouds on the plane of air
 disclose extinct species alongside genocided ones
 a tribute to Terry Pratchett
-Some levels in Gehennom now use the old corridor-style maze instead of
-    the new room-style. Beelzebub's level always does this and the
-    "beetle legs" are restored.
+Some levels in Gehennom now use the old corridor-style maze instead of the
+	new room-style. Beelzebub's level always does this and the
+	"beetle legs" are restored.
 gnomes will occasionally have a candle
 stop travel or run when you get hungry
 'I' command can accept 'B','U','C',or 'X' as an alternative to normal object