Fix text-wrapping special case

If a line of text contained a whole word that was longer than the
allotted space, it would fail to wrap that line completely, even
if it was possible to wrap at other locations.

Fixing this uncovered a second issue, where it would drop the last
line if the input had more than one lines and one of the first ones
was wider than the specified width.

OpenRA.Game/Exts.cs

@@ -149,7 +149,7 @@ namespace OpenRA
 
 		public static string JoinWith<T>(this IEnumerable<T> ts, string j)
 		{
-			return string.Join(j, ts.Select(t => t.ToString()).ToArray());
+			return string.Join(j, ts);
 		}
 
 		public static IEnumerable<T> Append<T>(this IEnumerable<T> ts, params T[] moreTs)