Update README.md

Author: Mia Steinkirch

README.md

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 #### 📚[Download the digital book here.](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/book/book_second_edition.pdf)
 
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 ##  ✨ Installation:
 
 The snippets are designed to be used individually. However, If you want  to install all fo the libraries in your [virtualenv](https://coderwall.com/p/8-aeka), do this:
@@ -11,11 +11,9 @@ The snippets are designed to be used individually. However, If you want  to inst
 $ pip install -r requirements.txt
 ```
 
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 ##  ✨ License
 
 <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a><br />
 
-This work is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/)
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+This work is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/).