isl_coalesce.c: fix typos in comment
isl_coalesce.c: fix typos in comment

Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

BenzoSM/isl,Meinersbur/isl,tobig/isl,VanirLLVM/toolchain_isl,PollyLabs/isl,tobig/isl,epowers/isl,cfx-next/toolchain_isl-upstream,serge-sans-paille/isl,pierrotdelalune/isl,jleben/isl,BobSaget-Mod/libisl,inducer/isl-mirror,serge-sans-paille/isl,cfx-next/toolchain_isl-upstream,serge-sans-paille/isl,Distrotech/isl,evaautomation/isl,SaberMod/isl-current,pierrotdelalune/isl,BenzoSM/isl,abduld/isl,epowers/isl,inducer/isl-mirror,Distrotech/isl,KangDroidSMProject/ISL,abduld/isl,Meinersbur/isl,inducer/isl-mirror,BobSaget-Mod/libisl,epowers/isl,SaberMod/isl-current,BobSaget-Mod/libisl,tobig/isl,cfx-next/toolchain_isl-upstream,epowers/isl,KangDroidSMProject/ISL,Meinersbur/isl,simbuerg/isl,KangDroidSMProject/ISL,PollyLabs/isl,pierrotdelalune/isl,VanirLLVM/toolchain_isl,BenzoSM/isl,simbuerg/isl,SaberMod/isl-current,tobig/isl,PollyLabs/isl,nicolasvasilache/isl,KangDroidSMProject/ISL,crossbuild/isl,BobSaget-Mod/libisl,serge-sans-paille/isl,evaautomation/isl,UBERTC/isl,PollyLabs/isl,BobSaget-Mod/libisl,Distrotech/isl,KangDroidSMProject/ISL,abduld/isl,nicolasvasilache/isl,crossbuild/isl,pierrotdelalune/isl,jleben/isl,UBERTC/isl,BenzoSM/isl,cfx-next/toolchain_isl-upstream,simbuerg/isl,Meinersbur/isl,inducer/isl-mirror,Distrotech/isl,VanirLLVM/toolchain_isl,PollyLabs/isl,UBERTC/isl,epowers/isl,simbuerg/isl,VanirLLVM/toolchain_isl,jleben/isl,UBERTC/isl,jleben/isl,Distrotech/isl,crossbuild/isl,nicolasvasilache/isl,abduld/isl,BenzoSM/isl,jleben/isl,serge-sans-paille/isl,simbuerg/isl,evaautomation/isl,evaautomation/isl,cfx-next/toolchain_isl-upstream,SaberMod/isl-current,crossbuild/isl,inducer/isl-mirror,nicolasvasilache/isl,nicolasvasilache/isl,VanirLLVM/toolchain_isl,pierrotdelalune/isl