Add spec for GitHub issue #153
Add spec for GitHub issue #153

https://github.com/Casecommons/pg_search/issues/153
paultyng/pg_search,mpivaa/pg_search,zvikamenahemi/pg_search,savef/pg_search,Casecommons/pg_search,zvikamenahemi/pg_search,undergroundwebdesigns/pg_search,rigoleto/pg_search,rigoleto/pg_search,Casecommons/pg_search,mpivaa/pg_search,paultyng/pg_search,savef/pg_search,undergroundwebdesigns/pg_search