Doc: fix typo on setup page

MoOx · MoOx · commit 583957ec695e · 2016-01-08T07:18:55.000+01:00
Closes MoOx#242
diff --git a/docs/content/setup.md b/docs/content/setup.md
@@ -36,11 +36,11 @@ PostCSS runner that suits your workflow:
 
 ---
 
-## Wait? What where is the previous cssnext interface?
+## Wait, what? Where is the previous cssnext interface?
 
 [`cssnext` is dead. Long live to `postcss-cssnext`.](/postcss/)
 
 
-## Wait? What is PostCSS?
+## Wait, what is PostCSS?
 
 [Here is what you are looking for.](https://github.com/postcss/postcss#readme)
