[test] Style fix for "Transform you-should-be-using-LLVM_DEBUG to Python"
[test] Style fix for "Transform you-should-be-using-LLVM_DEBUG to Python"

Make the string a multi-line string. To avoid triggering the test itself
with the message, interpolate the DEBUG part into the string.

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