Return string.Empty is span IsEmpty

MediaBrowser.Providers/Lyric/LrcLyricProvider.cs

@@ -201,11 +201,13 @@ public class LrcLyricProvider : ILyricProvider
 
     private static string GetMetadataFieldName(string metaDataRow, int index)
     {
-        return metaDataRow.AsSpan(1, index - 1).Trim().ToString();
+        var metadataFieldName = metaDataRow.AsSpan(1, index - 1).Trim();
+        return metadataFieldName.IsEmpty ? string.Empty : metadataFieldName.ToString();
     }
 
     private static string GetMetadataValue(string metaDataRow, int index)
     {
-        return metaDataRow.AsSpan(index + 1, metaDataRow.Length - index - 2).Trim().ToString();
+        var metadataValue = metaDataRow.AsSpan(index + 1, metaDataRow.Length - index - 2).Trim();
+        return metadataValue.IsEmpty ? string.Empty : metadataValue.ToString();
     }
 }

MediaBrowser.Providers/Lyric/TxtLyricProvider.cs

@@ -48,9 +48,9 @@ public class TxtLyricProvider : ILyricProvider
 
         LyricLine[] lyricList = new LyricLine[lyricTextLines.Length];
 
-        for (int lyricLine = 0; lyricLine < lyricTextLines.Length; lyricLine++)
+        for (int lyricLineIndex = 0; lyricLineIndex < lyricTextLines.Length; lyricLineIndex++)
         {
-            lyricList[lyricLine] = new LyricLine(lyricTextLines[lyricLine]);
+            lyricList[lyricLineIndex] = new LyricLine(lyricTextLines[lyricLineIndex]);
         }
 
         return new LyricResponse { Lyrics = lyricList };