Handling of git lfs

[fzumstein]

Currently, when installing git lfs after running git xltrail install --local, .gitattributes looks like this:

*.xla diff=xltrail
*.xla merge=xltrail
*.xlam diff=xltrail
*.xlam merge=xltrail
*.xls diff=xltrail
*.xls merge=xltrail
*.xlsb diff=xltrail
*.xlsb merge=xltrail
*.xlsm diff=xltrail
*.xlsm merge=xltrail
*.xlsx diff=xltrail
*.xlsx merge=xltrail
*.xlt diff=xltrail
*.xlt merge=xltrail
*.xltm diff=xltrail
*.xltm merge=xltrail
*.xltx diff=xltrail
*.xltx merge=xltrail
*.xls* filter=lfs diff=lfs merge=lfs -text

and for diffing, lfs overwrites xltrail

[ttaylorr]

👋 @fzumstein, I am a maintainer of Git LFS, and would be happy to help with this integration in whatever way I can be most useful. Please don't hesitate to let me know of any questions!