Make all_nutrition_starve_test far more strict

Now that vitamins aren't disappearing, this test can be tuned to make
sure that vitamins are being absorbed into the body correctly.

data/json/items/comestibles/meat_dishes.json

@@ -400,6 +400,16 @@
     "fun": -8,
     "vitamins": [ [ "iron", 3 ] ]
   },
+  {
+    "type": "COMESTIBLE",
+    "id": "debug_nutrition",
+    "copy-from": "can_spam",
+    "name": "holy SPAM of debugging",
+    "calories": 2100,
+    "description": "A mysterious lump of SPAM that contains just enough calories and vitamins to feed you for a day.  For debug use only.",
+    "//": "This is used for the all_nutrient_starve_test.",
+    "vitamins": [ [ "vitA", 96 ], [ "vitB", 96 ], [ "vitC", 96 ], [ "calcium", 96 ], [ "iron", 96 ] ]
+  },
   {
     "type": "COMESTIBLE",
     "id": "can_sardine",

tests/stomach_contents_tests.cpp

@@ -75,24 +75,9 @@ static void print_stomach_contents( player &p, const bool print )
 // accounting for appropriate vitamins
 static void eat_all_nutrients( player &p )
 {
-    // Absorption rates are imperfect for now, so target is 140% DV (== 135 vitamin units if rate is 15m)
-    item f( "fried_brain" );
-    p.eat( f );
-    f = item( "carrot" );
-    p.eat( f );
-    f = item( "carrot" );
-    p.eat( f );
-    f = item( "hotdogs_cooked" );
-    p.eat( f );
-    f = item( "veggy" );
-    p.eat( f );
-    f = item( "can_herring" );
-    p.eat( f );
-    f = item( "can_herring" );
-    p.eat( f );
-    f = item( "can_herring" );
-    p.eat( f );
-    f = item( "junk_burrito" );
+    // Vitamin target: 100% DV -- or 96 vitamin "units" since all vitamins currently decay every 15m.
+    // Energy target: 2100 kcal -- debug target will be completely sedentary.
+    item f( "debug_nutrition" );
     p.eat( f );
 }