format with gofumpt (#18184)

* gofumpt -w -l .

* gofumpt -w -l -extra .

* Add linter

* manual fix

* change make fmt

modules/structs/hook.go

@@ -13,10 +13,8 @@ import (
 	"code.gitea.io/gitea/modules/json"
 )
 
-var (
-	// ErrInvalidReceiveHook FIXME
-	ErrInvalidReceiveHook = errors.New("Invalid JSON payload received over webhook")
-)
+// ErrInvalidReceiveHook FIXME
+var ErrInvalidReceiveHook = errors.New("Invalid JSON payload received over webhook")
 
 // Hook a hook is a web hook when one repository changed
 type Hook struct {