see #72: use travis-ci

pdf/zh-cn/aggregator.py

@@ -1,19 +1,21 @@
 # !/usr/bin/env python3
 # author: changkun<hi@changkun.us>
 
-import os
+import os, io
 
 chapters = ['00-preface.md', '01-intro.md',  '02-usability.md', '03-runtime.md', '04-containers.md', '05-pointers.md', '06-regex.md', '07-thread.md', '08-filesystem.md', '09-others.md', '10-cpp20.md', 'appendix1.md', 'appendix2.md']
 
 ignores = ['TOC', '返回目录', '许可', 'license']
 
-with open('modern-cpp-tutorial.md', 'w') as outfile:
-    outfile.write("""---
+head = """---
 title: "高速上手 C++11/14/17/20"
 author: 欧长坤 <hi@changkun.us>
 copyright: cc-by-nc-nd 4.0
 ---
-""")
+"""
+
+with io.open('modern-cpp-tutorial.md', 'w', encoding='utf8') as outfile:
+    outfile.write(head)
     for chapter in chapters:
         if os.path.isfile(chapter):
             with open(chapter) as ch: