Remove the 'B' suffix in file_size_float() output

To match behavior of changed xpdev->byte_estimated_to_str().

If the caller wants a 'B' suffix, they can add it.

exec/load/file_size.js

@@ -78,5 +78,5 @@ function file_size_float(size, unit, precision)
 	else if(size >= one_kibibyte || unit == one_kibibyte)
 		return format("%1.*fK", precision, size/one_kibibyte);
 	else
-		return format("%luB", size);
+		return format("%lu", size);
 }