Fix docs (missing indentation in examples)
Merge pull request #2697 from hamiltop/patch-1

Fix docs (missing indentation in examples)
Update CONTRIBUTING.md

renamed 'issues tracker' to 'issue tracker' for consistency
Merge pull request #2698 from Kosmas/master

Update CONTRIBUTING.md
Add a small note to UndefinedFunctionError when the module is not available
Add Task.start/1 and Task.start/3
Use task start to get better reports
Fix the build