fixed sum files

.gitattributes

···
-# Auto detect text files and perform LF normalization
-* text=auto

save_data/typemania_save.json

···
-{"all_plays": [{"quote": "Thank you Mario! But our Princess is in another castle!", "net_wpm": 51, "wpm": 62, "errors": 11}]}
+{"all_plays": []}