Merge pull request #187 from weakish/free-space-message

Change free space message to avoid ambiguity.

bin/xbps-install/transaction.c

@@ -211,7 +211,7 @@ show_transaction_sizes(struct transaction *trans, int cols)
 			    "%s\n", strerror(errno));
 			return -1;
 		}
-		printf("Free space on disk:           %6s\n", size);
+		printf("Space available on disk:           %6s\n", size);
 	}
 	printf("\n");