format with gofumpt (#18184)

* gofumpt -w -l .

* gofumpt -w -l -extra .

* Add linter

* manual fix

* change make fmt

routers/api/v1/user/watch.go

@@ -170,7 +170,6 @@ func Watch(ctx *context.APIContext) {
 		URL:           subscriptionURL(ctx.Repo.Repository),
 		RepositoryURL: ctx.Repo.Repository.APIURL(),
 	})
-
 }
 
 // Unwatch the repo specified in ctx, as the authenticated user