Adds support for blame ignore using ignoreRevsFile (#4402)
Adds support for blame ignore using ignoreRevsFile (#4402)

This feature is useful to ignore large formatting changes when blaming,
and this repo has one large such revision.
WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen