A list of open source contributions I've made; some are small, but it's nice to remember them:
I extended the Range#cover? method in the MRI Ruby standard library to accept other
Rangeobjects to allow easy checking for sub-ranges, as demonstrated in the BigBinary blog that introduces new features coming in Ruby 2.6.
- Ruby SQL
I fixed a bug, normalised multi-language implementations and improved test coverage of the Mailchecker project that rejects invalid/throwaway email addresses