format with gofumpt (#18184)

* gofumpt -w -l .

* gofumpt -w -l -extra .

* Add linter

* manual fix

* change make fmt

modules/context/api_test.go

@@ -16,7 +16,7 @@ import (
 
 func TestGenAPILinks(t *testing.T) {
 	setting.AppURL = "http://localhost:3000/"
-	var kases = map[string][]string{
+	kases := map[string][]string{
 		"api/v1/repos/jerrykan/example-repo/issues?state=all": {
 			`<http://localhost:3000/api/v1/repos/jerrykan/example-repo/issues?page=2&state=all>; rel="next"`,
 			`<http://localhost:3000/api/v1/repos/jerrykan/example-repo/issues?page=5&state=all>; rel="last"`,