Adding full stop to README, that is all

README.md

@@ -81,7 +81,7 @@ guide the learner’s interaction with the component.
 
 >>**alt** (string): This text becomes the image’s `alt` attribute.
 
->>**attribution** (string): Optional text to be displayed as an [attribution](https://wiki.creativecommons.org/Best_practices_for_attribution). By default it is displayed below the image. Adjust positioning by modifying CSS. Text can contain HTML tags, e.g., `Copyright © 2015 by <b>Lukasz 'Severiaan' Grela</b>`  
+>>**attribution** (string): Optional text to be displayed as an [attribution](https://wiki.creativecommons.org/Best_practices_for_attribution). By default it is displayed below the image. Adjust positioning by modifying CSS. Text can contain HTML tags, e.g., `Copyright © 2015 by <b>Lukasz 'Severiaan' Grela</b>`.
 
 **_feedback** (object): If the [**Tutor** extension](https://github.com/adaptlearning/adapt-contrib-tutor) is enabled, these various texts will be displayed depending on the submitted answer. **_feedback**
 contains values for three types of answers: **correct**, **_incorrect**, and **_partlyCorrect**. Some attributes are optional. If they are not supplied, the default that is noted below will be used.