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diff --git a/build/qr-example.pdf b/build/qr-example.pdf
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diff --git a/preview-1.png b/preview-1.png
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+version https://git-lfs.github.com/spec/v1
+oid sha256:4ac30ca1accb5393df6dbdc5addea85dcd76a94dc3125b8a253a56998ed0505c
+size 233071