box
find src -name '*.rs' | xargs sed -i '' 's/~~~.*{\.rust}/```rust/g' find src -name '*.rs' | xargs sed -i '' 's/ ~~~$/ ```/g' find src -name '*.rs' | xargs sed -i '' 's/^~~~$/ ```/g'
existing tests. The bug itself was fixed as part of recent borrowck reform. Fixes #4666.