diff -ur v14/ezyaml.py v15/ezyaml.py
--- v14/ezyaml.py	2018-09-08 18:08:45.000000000 +0900
+++ v15/ezyaml.py	2018-09-10 21:16:31.000000000 +0900
@@ -28,13 +28,13 @@
 		if qt:
 			if c in qts:
 				lst[-1] += c
-				lst += ''
+				lst += ['']
 				qt = None
 				continue
 		elif c in qts:
 			qt = c
 			if lst[-1]:
-				lst += ''
+				lst += ['']
 		lst[-1] += c
 
 	while len(lst) > 1 and lst[-1] == '':