search only the difffs

makeadiffdir.sh

# Search through only the diff files from https://archive.org/download/IRS990-efile

cd IRS990-efile/irs_form990_schemas
mkdir diffs
cd diffs
for diffdir in `find ../ -name '*Diffs*'`; do ln -s $diffdir; done

# Now, we have a directory full of symlinks to the diff dirs in each of the schema versions.
# We can grep freely now:

grep -Rl '"BusinessName"'