more precise dipping prompt (trunk only)

Someone in the newsgroup accidentally dipped the wrong item into a
fountain and wants the second prompt to be "Dip <obj> into the fountain?"
instead of just "Dip _it_ into the fountain?", hoping that he would have
noticed that he had selected the wrong object.  I think he's fooling
himself there, but this gives a brief object name for fountain, pool, and
potion prompts.

doc/fixes35.0

@@ -360,6 +360,7 @@ add `#vanquished' debug mode command
 C and #name commands are now same and use menu to choose monster vs object
 hallucination provides partial protection against gaze attacks
 attempting to read "dull" spellbook might cause hero to fall asleep
+dipping prompt is more precise
 
 
 Platform- and/or Interface-Specific New Features

src/potion.c

@@ -1699,17 +1699,19 @@ dodip()
 		return(0);
 	if (inaccessible_equipment(obj, "dip", FALSE)) return 0;
 
+	Sprintf(qbuf, "dip %s into", thesimpleoname(obj));
 	here = levl[u.ux][u.uy].typ;
 	/* Is there a fountain to dip into here? */
 	if (IS_FOUNTAIN(here)) {
-		if(yn("Dip it into the fountain?") == 'y') {
+		Strcat(qbuf, " the fountain?");
+		if (yn(upstart(qbuf)) == 'y') {
 			dipfountain(obj);
 			return(1);
 		}
 	} else if (is_pool(u.ux,u.uy)) {
 		tmp = waterbody_name(u.ux,u.uy);
-		Sprintf(qbuf, "Dip it into the %s?", tmp);
-		if (yn(qbuf) == 'y') {
+		Sprintf(eos(qbuf), " the %s?", tmp);
+		if (yn(upstart(qbuf)) == 'y') {
 		    if (Levitation) {
 			floating_above(tmp);
 #ifdef STEED
@@ -1726,8 +1728,8 @@ dodip()
 		}
 	}
 
-	if(!(potion = getobj(beverages, "dip into")))
-		return(0);
+	potion = getobj(beverages, qbuf);	/* "dip into" */
+	if (!potion) return 0;
 	if (potion == obj && potion->quan == 1L) {
 		pline("That is a potion bottle, not a Klein bottle!");
 		return 0;