chore: typo (#392)

Pyxidatol-C · QingWei-Li · commit 84f7b5c7c2c6 · 2018-02-15T08:57:17.000+08:00
&gt; Only coverpage is loaded when ~~When~~ visiting the home page.
diff --git a/docs/configuration.md b/docs/configuration.md
@@ -380,7 +380,7 @@ window.$docsify = {
 
 * type: `Boolean`
 
-Only coverpage is loaded when When visiting the home page.
+Only coverpage is loaded when visiting the home page.
 
 ```js
 window.$docsify = {
