[IDE] NFC: Fix test-case which now diagnoses correctly
[IDE] NFC: Fix test-case which now diagnoses correctly

Behavior changed when it became possible to omit `return` in
single expression functions but it hasn't been diagnosed correctly.

apple/swift,xwu/swift,gregomni/swift,tkremenek/swift,jckarter/swift,nathawes/swift,roambotics/swift,sschiau/swift,hooman/swift,roambotics/swift,hooman/swift,roambotics/swift,allevato/swift,roambotics/swift,benlangmuir/swift,lorentey/swift,jckarter/swift,stephentyrone/swift,atrick/swift,parkera/swift,jckarter/swift,CodaFi/swift,CodaFi/swift,aschwaighofer/swift,sschiau/swift,glessard/swift,shahmishal/swift,JGiola/swift,atrick/swift,tkremenek/swift,tkremenek/swift,benlangmuir/swift,aschwaighofer/swift,harlanhaskins/swift,lorentey/swift,karwa/swift,shahmishal/swift,benlangmuir/swift,CodaFi/swift,xwu/swift,aschwaighofer/swift,gribozavr/swift,xwu/swift,sschiau/swift,jmgc/swift,devincoughlin/swift,stephentyrone/swift,devincoughlin/swift,aschwaighofer/swift,harlanhaskins/swift,airspeedswift/swift,sschiau/swift,lorentey/swift,ahoppen/swift,jmgc/swift,allevato/swift,hooman/swift,CodaFi/swift,CodaFi/swift,gribozavr/swift,gribozavr/swift,xwu/swift,lorentey/swift,devincoughlin/swift,parkera/swift,benlangmuir/swift,ahoppen/swift,parkera/swift,devincoughlin/swift,harlanhaskins/swift,CodaFi/swift,JGiola/swift,JGiola/swift,allevato/swift,lorentey/swift,hooman/swift,airspeedswift/swift,ahoppen/swift,sschiau/swift,rudkx/swift,tkremenek/swift,JGiola/swift,gribozavr/swift,hooman/swift,aschwaighofer/swift,parkera/swift,stephentyrone/swift,rudkx/swift,jckarter/swift,airspeedswift/swift,nathawes/swift,jmgc/swift,sschiau/swift,karwa/swift,lorentey/swift,ahoppen/swift,xwu/swift,karwa/swift,airspeedswift/swift,devincoughlin/swift,karwa/swift,hooman/swift,roambotics/swift,gregomni/swift,JGiola/swift,stephentyrone/swift,gribozavr/swift,ahoppen/swift,shahmishal/swift,stephentyrone/swift,nathawes/swift,atrick/swift,shahmishal/swift,gregomni/swift,stephentyrone/swift,harlanhaskins/swift,stephentyrone/swift,nathawes/swift,nathawes/swift,airspeedswift/swift,karwa/swift,atrick/swift,jmgc/swift,devincoughlin/swift,rudkx/swift,glessard/swift,glessard/swift,devincoughlin/swift,apple/swift,shahmishal/swift,shahmishal/swift,harlanhaskins/swift,glessard/swift,ahoppen/swift,tkremenek/swift,rudkx/swift,gregomni/swift,apple/swift,gregomni/swift,nathawes/swift,jmgc/swift,lorentey/swift,airspeedswift/swift,karwa/swift,sschiau/swift,hooman/swift,jmgc/swift,allevato/swift,allevato/swift,shahmishal/swift,atrick/swift,sschiau/swift,allevato/swift,xwu/swift,jckarter/swift,gribozavr/swift,CodaFi/swift,parkera/swift,atrick/swift,apple/swift,parkera/swift,jckarter/swift,aschwaighofer/swift,parkera/swift,devincoughlin/swift,roambotics/swift,nathawes/swift,karwa/swift,airspeedswift/swift,xwu/swift,tkremenek/swift,gregomni/swift,parkera/swift,shahmishal/swift,jckarter/swift,harlanhaskins/swift,allevato/swift,benlangmuir/swift,rudkx/swift,glessard/swift,jmgc/swift,rudkx/swift,tkremenek/swift,glessard/swift,gribozavr/swift,harlanhaskins/swift,aschwaighofer/swift,apple/swift,lorentey/swift,karwa/swift,benlangmuir/swift,JGiola/swift,gribozavr/swift,apple/swift