Update r.md

Author: Gscorreia89

r.md

@@ -129,7 +129,7 @@ Additional information is often provided together with packages on their website
 - tidyR
 - XCMS
 
-Check out [tidyverse](https://www.tidyverse.org/) a set of packages specifically designed for data science.
+Check out [tidyverse](https://www.tidyverse.org/), a set of packages specifically designed for data science.
 
 ## Data types