Acronym: New test case for apostrophe (#1377)
Acronym: New test case for apostrophe (#1377)

* add Halley's Comet test

ErikSchierboom/x-common,exercism/x-common,jmluy/x-common,jmluy/x-common,rpottsoh/x-common,petertseng/x-common,ErikSchierboom/x-common,petertseng/x-common,jmluy/x-common,exercism/x-common,rpottsoh/x-common