chore(gitbook): use arial

azu · azu · commit d06d38dce94f · 2016-06-07T11:44:03.000+09:00
diff --git a/book.json b/book.json
@@ -5,7 +5,7 @@
   "githubId": "azu/JavaScript-Plugin-Architecture",
   "author": "azu",
   "pdf": {
-    "fontFamily": "mplus"
+    "fontFamily": "arial"
   },
   "plugins": [
     "include-codeblock",
