Update readme.txt

Author: joppuyo

readme.txt

@@ -9,7 +9,7 @@ License: License: GPLv3 or later
 Indents the HTML markup output by WordPress
 
 == Description ==
-Indents the HTML markup output by WordPress using the [Dindent](https://github.com/gajus/dindent) library. Only does its thing when you are not logged in.
+Indents the HTML markup output by WordPress using the [Dindent](https://github.com/gajus/dindent) library. It only does its thing when you are not logged in.
 
 == Installation ==
 1. Upload the plugin folder to the /wp-content/plugins/ directory