Adds some specs over equivalency configuration appearing in exception messages
Adds some specs over equivalency configuration appearing in exception messages

zmaruo/fluentassertions,AlexanderSher/fluentassertions,fluentassertions/fluentassertions,ArsenShnurkov/fluentassertions,msackton/FluentAssertions,MortenBoysen/FluentAssertions,jnyrup/fluentassertions,piotrpMSFT/fluentassertions,SaroTasciyan/FluentAssertions,levenleven/fluentassertions,ben-m-lucas/FluentAssertions,jnyrup/fluentassertions,dennisdoomen/fluentassertions,somewhatabstract/fluentassertions,dennisdoomen/fluentassertions,onovotny/fluentassertions,fluentassertions/fluentassertions,rstam/fluentassertions,vossad01/fluentassertions,okobylianskyi/FluentAssertions,jeroenpot/FluentAssertions