Fix new lint errors

Author: leotaku

cmd/formats/download/root.go

@@ -234,7 +234,7 @@ func getImageWithPolicy(client *http.Client, ctx context.Context, path md.Path,
 	}
 
 	img, _, err := image.Decode(resp.Body)
-	defer resp.Body.Close()
+	defer resp.Body.Close() //nolint:errcheck
 
 	if err != nil && policy == DataSaverPolicyFallback {
 		return getImageWithPolicy(client, ctx, path, DataSaverPolicyPrefer)

cmd/formats/kindle/filesystem.go

@@ -58,22 +58,20 @@ func (n *NormalizedDirectory) Write(identifier md.Identifier, mobi mobi.Book, p
 	if err != nil {
 		return fmt.Errorf("create: %w", err)
 	}
+	defer f.Close() //nolint:errcheck
 	if err := mobi.Realize().Write(p.NewProxyWriter(f)); err != nil {
-		f.Close()
 		return fmt.Errorf("write: %w", err)
 	}
-	f.Close()
 
 	if n.thumbnailDirectory != "" && mobi.CoverImage != nil {
 		f, err := create(path.Join(n.thumbnailDirectory, mobi.GetThumbFilename()))
 		if err != nil {
 			return fmt.Errorf("create: %w", err)
 		}
+		defer f.Close() //nolint:errcheck
 		if err := jpeg.Encode(p.NewProxyWriter(f), mobi.CoverImage, nil); err != nil {
-			f.Close()
 			return fmt.Errorf("write: %w", err)
 		}
-		f.Close()
 	}
 
 	return nil

cmd/help.go

@@ -39,15 +39,15 @@ func writeHelp(cmd *cobra.Command, w io.Writer) {
 		return result
 	}
 
-	fmt.Fprintf(w, "Usage:\n  %v\n", cmd.Use)
+	fmt.Fprintf(w, "Usage:\n  %v\n", cmd.Use) //nolint:errcheck
 	for _, name := range keys(groups) {
-		fmt.Fprintf(w, "\n%v:\n", name[1:])
+		fmt.Fprintf(w, "\n%v:\n", name[1:]) //nolint:errcheck
 		for _, f := range groups[name] {
 			shorthand := ""
 			if len(f.Shorthand) > 0 {
 				shorthand = "-" + f.Shorthand + ", "
 			}
-			fmt.Fprintf(w, "  %4v--%-20v%v\n", shorthand, f.Name, toSentenceCase(f.Usage))
+			fmt.Fprintf(w, "  %4v--%-20v%v\n", shorthand, f.Name, toSentenceCase(f.Usage)) //nolint:errcheck
 		}
 	}
 }

mangadex/api/client.go

@@ -115,7 +115,7 @@ func (c *Client) doJSON(ctx context.Context, method, ref string, result, body in
 	if err != nil {
 		return fmt.Errorf("do: %w", err)
 	}
-	defer resp.Body.Close()
+	defer resp.Body.Close() //nolint:errcheck
 
 	dec := json.NewDecoder(resp.Body)
 	if resp.StatusCode < 200 || resp.StatusCode >= 300 {