device: fix escape in warning
device: fix escape in warning

the new logger calls string.format() on this

gallenmu/MoonGen,dschoeffm/MoonGen,gallenmu/MoonGen,scholzd/MoonGen,emmericp/MoonGen,bmichalo/MoonGen,bmichalo/MoonGen,atheurer/MoonGen,gallenmu/MoonGen,wenhuizhang/MoonGen,emmericp/MoonGen,atheurer/MoonGen,gallenmu/MoonGen,emmericp/MoonGen,gallenmu/MoonGen,wenhuizhang/MoonGen,gallenmu/MoonGen,duk3luk3/MoonGen,wenhuizhang/MoonGen,NetronomeMoongen/MoonGen,dschoeffm/MoonGen,NetronomeMoongen/MoonGen,scholzd/MoonGen,bmichalo/MoonGen,NetronomeMoongen/MoonGen,bmichalo/MoonGen,dschoeffm/MoonGen,atheurer/MoonGen,gallenmu/MoonGen,duk3luk3/MoonGen,gallenmu/MoonGen,scholzd/MoonGen,duk3luk3/MoonGen