Unable to install simavr
It failed with this issue
Possibly markups from git merge conflict resolve UI somehow ended up here
It looks like a local issue. As you can see, the formula has no <<<<<< https://github.com/osx-cross/homebrew-avr/blob/68632955c4d9e9173204df53b29e6c2a36ae4b52/Formula/simavr.rb
Try removing the tap and using brew tap again.
Yea, it did was a local issue. By untapping and tapping the repo and trying to install again the issue has gone away