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

@@ -221,7 +221,7 @@ loop:
 			err := func() error {
 				r := msg.GetBody(section)
 				if r == nil {
-					return fmt.Errorf("could not get body from message: %w", err)
+					return fmt.Errorf("could not get body from message")
 				}
 
 				env, err := enmime.ReadEnvelope(r)

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)
 		}
 	}