bump: 3.7.2

CHANGELOG.md

@@ -1,6 +1,11 @@
 # Changelog
 
 
+## 3.7.2 / 2017-05-19
+
+  * tweaks
+
+
 ## 3.7.1 / 2017-05-19
 
   * fix: docsify-updated is undefined

lib/docsify.js

@@ -666,8 +666,7 @@ function get (url, hasBar) {
           var result = cache[url] = {
             content: target.response,
             opt: {
-              updatedAt: xhr.getResponseHeader('last-modified') ||
-                xhr.getResponseHeader('expires')
+              updatedAt: xhr.getResponseHeader('last-modified')
             }
           };