Fmt runs the command ‘gofmt -l -w’ on the packages named by the import paths. It prints the names of the
files that are modified.
For more about gofmt, see ‘go doc cmd/gofmt’.
For more about specifying packages, see go-packages(7).
-n The -n flag prints commands that would be executed.
-x The -x flag prints commands as they are executed.
-mod The -mod flag’s value sets which module download mode to use: readonly or vendor. See ‘go help
modules’ for more.
To run gofmt with specific options, run gofmt itself.