[tangrufus]

• Modernize modernize with go fix
• Use -diff with go mod tidy

---

Since Go 1.26, the 'go fix' command has included the modernize suite

-- https://pkg.go.dev/golang.org/x/tools@v0.51.0/go/analysis/passes/modernize

The new go mod tidy -diff flag causes the command not to modify the files but instead print the necessary changes as a unified diff. It exits with a non-zero code if updates are needed.

-- https://go.dev/doc/go1.23