Show number of assertions in output.

[utkarshkukreti]

trafficstars

I searched around, but couldn't find a way to do it. Something like:

1 example, 0 failures, 3 assertions

In this question, @dchelimsky suggested to open a feature request, so here I am :smiley_cat:

Edit: @xaviershay's summary of comments below as of Jan 2017:

• Proposed API: https://github.com/rspec/rspec-core/issues/740#issuecomment-15700039
• External gem that claims to do this (I haven't verified): https://github.com/bootstraponline/rspec_expectation_count