Revert "Added output.txt to .gitignore"

This reverts commit 6bfb704dc7f4b8be43a2890b977b594a7d638e31.
Revert "Revert "Added output.txt to .gitignore""

This reverts commit da602b4afe2fc2556f0e8e985388716bbe4ee0c6.
Clicked the wrong button, and had to revert.