Update InferLab.md

teaching/InferLab.md

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-A team from Facebook came run a lab on [Infer](http://fbinfer.com/), an industrial verification tool developed at Facebook by a team led by [Peter O’Hearn](http://www.pl-enthusiast.net/2015/09/15/facebooks-peter-ohearn-on-programming-languages/)
+A team from Facebook came run a lab on [Infer](http://fbinfer.com/), an industrial verification tool developed at Facebook by a team led by 
+[Peter O’Hearn](http://www.pl-enthusiast.net/2015/09/15/facebooks-peter-ohearn-on-programming-languages/)
 
 Petar O'Hearn, Engineering Manager at Facebook, and Jules Villard, Software Engineer, gave a tutorial on how to use Infer 
-- an automatic verification tool based on separation logic to students on the Separation Logic MEng and MSc course.. At Facebook, Infer is used every day to verify millions of lines of code. 
+- an automatic verification tool based on separation logic to students on the Separation Logic MEng and MSc course. 
+At Facebook, Infer is used every day to verify millions of lines of code. 
 The tutorial targeted real world Android applications, such as: 
  - [PocketHub](https://github.com/pockethub/PocketHub)
  - [Wikipedia Android app](https://github.com/wikimedia/apps-android-wikipedia)