Fix linebreak `dos-newlines` issue. (#5020)

torchvision/prototype/datasets/_builtin/coco.categories

-__background__,N/A
-person,person
-bicycle,vehicle
-car,vehicle
-motorcycle,vehicle
-airplane,vehicle
-bus,vehicle
-train,vehicle
-truck,vehicle
-boat,vehicle
-traffic light,outdoor
-fire hydrant,outdoor
-N/A,N/A
-stop sign,outdoor
-parking meter,outdoor
-bench,outdoor
-bird,animal
-cat,animal
-dog,animal
-horse,animal
-sheep,animal
-cow,animal
-elephant,animal
-bear,animal
-zebra,animal
-giraffe,animal
-N/A,N/A
-backpack,accessory
-umbrella,accessory
-N/A,N/A
-N/A,N/A
-handbag,accessory
-tie,accessory
-suitcase,accessory
-frisbee,sports
-skis,sports
-snowboard,sports
-sports ball,sports
-kite,sports
-baseball bat,sports
-baseball glove,sports
-skateboard,sports
-surfboard,sports
-tennis racket,sports
-bottle,kitchen
-N/A,N/A
-wine glass,kitchen
-cup,kitchen
-fork,kitchen
-knife,kitchen
-spoon,kitchen
-bowl,kitchen
-banana,food
-apple,food
-sandwich,food
-orange,food
-broccoli,food
-carrot,food
-hot dog,food
-pizza,food
-donut,food
-cake,food
-chair,furniture
-couch,furniture
-potted plant,furniture
-bed,furniture
-N/A,N/A
-dining table,furniture
-N/A,N/A
-N/A,N/A
-toilet,furniture
-N/A,N/A
-tv,electronic
-laptop,electronic
-mouse,electronic
-remote,electronic
-keyboard,electronic
-cell phone,electronic
-microwave,appliance
-oven,appliance
-toaster,appliance
-sink,appliance
-refrigerator,appliance
-N/A,N/A
-book,indoor
-clock,indoor
-vase,indoor
-scissors,indoor
-teddy bear,indoor
-hair drier,indoor
-toothbrush,indoor
+__background__,N/A
+person,person
+bicycle,vehicle
+car,vehicle
+motorcycle,vehicle
+airplane,vehicle
+bus,vehicle
+train,vehicle
+truck,vehicle
+boat,vehicle
+traffic light,outdoor
+fire hydrant,outdoor
+N/A,N/A
+stop sign,outdoor
+parking meter,outdoor
+bench,outdoor
+bird,animal
+cat,animal
+dog,animal
+horse,animal
+sheep,animal
+cow,animal
+elephant,animal
+bear,animal
+zebra,animal
+giraffe,animal
+N/A,N/A
+backpack,accessory
+umbrella,accessory
+N/A,N/A
+N/A,N/A
+handbag,accessory
+tie,accessory
+suitcase,accessory
+frisbee,sports
+skis,sports
+snowboard,sports
+sports ball,sports
+kite,sports
+baseball bat,sports
+baseball glove,sports
+skateboard,sports
+surfboard,sports
+tennis racket,sports
+bottle,kitchen
+N/A,N/A
+wine glass,kitchen
+cup,kitchen
+fork,kitchen
+knife,kitchen
+spoon,kitchen
+bowl,kitchen
+banana,food
+apple,food
+sandwich,food
+orange,food
+broccoli,food
+carrot,food
+hot dog,food
+pizza,food
+donut,food
+cake,food
+chair,furniture
+couch,furniture
+potted plant,furniture
+bed,furniture
+N/A,N/A
+dining table,furniture
+N/A,N/A
+N/A,N/A
+toilet,furniture
+N/A,N/A
+tv,electronic
+laptop,electronic
+mouse,electronic
+remote,electronic
+keyboard,electronic
+cell phone,electronic
+microwave,appliance
+oven,appliance
+toaster,appliance
+sink,appliance
+refrigerator,appliance
+N/A,N/A
+book,indoor
+clock,indoor
+vase,indoor
+scissors,indoor
+teddy bear,indoor
+hair drier,indoor
+toothbrush,indoor