Fix error handling in mailer and wiki services

- Updated error message in `incoming.go` to remove unnecessary wrapping of the error.
- Corrected typo in error message in `wiki.go` for clarity.

Author: hamkido

services/mailer/incoming/incoming.go

@@ -218,11 +218,11 @@ loop:
 				return nil
 			}
 
-			err := func() error {
-				r := msg.GetBody(section)
-				if r == nil {
-					return fmt.Errorf("could not get body from message: %w", err)
-				}
+		err := func() error {
+			r := msg.GetBody(section)
+			if r == nil {
+				return fmt.Errorf("could not get body from message")
+			}
 
 				env, err := enmime.ReadEnvelope(r)
 				if err != nil {

services/wiki/wiki.go

@@ -135,7 +135,7 @@ func updateWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model
 	if hasDefaultBranch {
 		if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
 			log.Error("Unable to read HEAD tree to index in: %s %v", basePath, err)
-			return fmt.Errorf("fnable to read HEAD tree to index in: %s %w", basePath, err)
+			return fmt.Errorf("unable to read HEAD tree to index in: %s %w", basePath, err)
 		}
 	}