Fix stream read line (#1054)

* stream: fix stream_read_line return
* nfc: fix keys load

Co-authored-by: あく <alleteam@gmail.com>

lib/toolbox/stream/stream.h

@@ -102,8 +102,8 @@ bool stream_delete_and_insert(
  * Read line from a stream (supports LF and CRLF line endings)
  * @param stream 
  * @param str_result 
- * @return true if line was read
- * @return false if EOF
+ * @return true if line lenght is not zero
+ * @return false otherwise
  */
 bool stream_read_line(Stream* stream, string_t str_result);