base64: line does not end with newline

bin/base64.c

@@ -247,12 +247,11 @@ static bool
 write_wrapped (const struct config *config, char *buf, size_t len)
 {
 	static size_t col = 0;
-	static char nl = '\x00';
 
 	// Special case: if buf is NULL, print final trailing newline.
 	if (buf == NULL) {
 		if (config->wrap > 0 && col > 0) {
-			return write_stdout(config, &nl, 1);
+			return write_stdout(config, "\n ", 2);
 		}
 		return true;
 	}
@@ -288,7 +287,7 @@ write_wrapped (const struct config *config, char *buf, size_t len)
 
 		// If the line is full, append a newline.
 		if (col == config->wrap) {
-			if (iov_append(config, iov, &nvec, &nl, 1) == false) {
+			if (iov_append(config, iov, &nvec, "\n ", 2) == false) {
 				return false;
 			}
 			col = 0;