pline missing punctuation bits

src/apply.c

@@ -1817,7 +1817,7 @@ struct obj *otmp;
 	if (otmp->cursed &&
 	    obj->oclass == GEM_CLASS && !is_greystone(obj) && !rn2(5)) {
 	    pline(
-		(Blind ? "You feel something shatter" :
+		(Blind ? "You feel something shatter." :
 		 (Hallucination ? "Oh, wow, look at the pretty shards." :
 		 "A sharp crack shatters %s %s.")),
 		(obj->quan == 1 ? "the" : "a"),

src/detect.c

@@ -770,7 +770,7 @@ struct obj *obj;
     int oops;
 
     if (Blind) {
-	pline("Too bad you can't see %s", the(xname(obj)));
+	pline("Too bad you can't see %s.", the(xname(obj)));
 	return;
     }
     oops = (rnd(20) > ACURR(A_INT) || obj->cursed);

src/do_name.c

@@ -155,7 +155,7 @@ const char *goal;
 			    }	/* column */
 			}	/* row */
 		    }		/* pass */
-		    pline("Can't find dungeon feature '%c'", c);
+		    pline("Can't find dungeon feature '%c'.", c);
 		    msg_given = TRUE;
 		    goto nxtc;
 		} else {