Steven Chanin

Under Ruby 2.7, pry-inline is generating a warning: ```ruby warning: __LINE__ in eval may not return location in binding; use Binding#source_location instead gems/pry-inline/lib/pry-inline/code_extension.rb:20: warning: in `eval' ``` this is related...

This is intended as a stacked PR on top of the `update_rspec_syntax` branch, but I couldn't see how to do that in the GitHub PR interface when submitting to someone...

The README uses `assert_equal`, but that was causing errors. I think that's the minitest syntax rather than RSpec.