Fixed 'R' header to match others

Author: Ian Sweet

curated.md

@@ -14,7 +14,7 @@ permalink: /curated/
 - [explainshell.com - match command-line arguments to their help text](http://explainshell.com/)
 - [The Command Line Crash Course - Quick course in using the command line](http://cli.learncodethehardway.org/book/)
 
-# R
+### R
 
 - [Try R](http://tryr.codeschool.com/)
 - [The Lubridate Package](http://www.jstatsoft.org/v40/i03/paper)
@@ -46,4 +46,4 @@ permalink: /curated/
 
 ### Data Science Groups, Meetups, and Networking
 
-- [LinkedIn Data Science Specialisation Group](https://www.linkedin.com/groups/Coursera-Specialization-Data-Science-7495000?home=&gid=7495000&trk=anet_ug_hm&goback=%2Egmp_7495000)
+- [LinkedIn Data Science Specialisation Group](https://www.linkedin.com/groups/Coursera-Specialization-Data-Science-7495000?home=&gid=7495000&trk=anet_ug_hm&goback=%2Egmp_7495000)