format with gofumpt (#18184)

* gofumpt -w -l .

* gofumpt -w -l -extra .

* Add linter

* manual fix

* change make fmt

modules/indexer/code/git.go

@@ -73,7 +73,7 @@ func parseGitLsTreeOutput(stdout []byte) ([]fileUpdate, error) {
 	if err != nil {
 		return nil, err
 	}
-	var idxCount = 0
+	idxCount := 0
 	updates := make([]fileUpdate, len(entries))
 	for _, entry := range entries {
 		if isIndexable(entry) {