README example lives in examples/minimal; CI keeps them equal

.github/workflows/ci.yml

@@ -53,6 +53,9 @@ jobs:
       - name: Race
         if: runner.os != 'Windows'
         run: go test -race ${{ matrix.skip }} ./...
+      - name: README example matches examples/minimal
+        if: runner.os == 'Linux'
+        run: diff <(awk '/^```go$/{f=1;n++;next} /^```$/{f=0} f && n==1' README.md) examples/minimal/main.go
       - name: Examples compile
         run: go build ./examples/...
       - name: Upload snapshot diffs