minor cleanup

internal/playlist/spotify.go

@@ -90,11 +90,12 @@ func (c *SpotifyClient) GetPlaylist(playlistID string) (*SpotifyPlaylist, error)
 	if err != nil {
 		return nil, err
 	}
+
 	defer resp.Body.Close()
 
 	body, _ := io.ReadAll(resp.Body)
 	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("API error (%d): %s", resp.StatusCode, body)
+		return nil, fmt.Errorf("status code: %d: %s", resp.StatusCode, body)
 	}
 
 	var playlist SpotifyPlaylist
@@ -115,6 +116,7 @@ func (c *SpotifyClient) renewToken() error {
 	if err != nil {
 		return err
 	}
+
 	req.Header.Set("Authorization", "Basic "+creds)
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 
@@ -122,11 +124,12 @@ func (c *SpotifyClient) renewToken() error {
 	if err != nil {
 		return err
 	}
+
 	defer resp.Body.Close()
 
 	body, _ := io.ReadAll(resp.Body)
 	if resp.StatusCode != http.StatusOK {
-		return fmt.Errorf("auth failed (%d): %s", resp.StatusCode, body)
+		return fmt.Errorf("auth failed: %d: %s", resp.StatusCode, body)
 	}
 
 	var token spotifyTokenResponse
@@ -158,5 +161,6 @@ func (c *SpotifyClient) doOnce(req *http.Request) (*http.Response, error) {
 	c.mu.Lock()
 	req.Header.Set("Authorization", "Bearer "+c.token)
 	c.mu.Unlock()
+
 	return c.httpClient.Do(req)
 }