fix bug in ImageExtensions

src/ImageSharp/Formats/ImageExtesions.Save.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
 // <auto-generated />
@@ -217,7 +217,7 @@ namespace SixLabors.ImageSharp
         public static Task SaveAsGifAsync(this Image source, string path, GifEncoder encoder, CancellationToken cancellationToken) =>
             source.SaveAsync(
                 path,
-                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance),
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(GifFormat.Instance),
                 cancellationToken);
 
         /// <summary>
@@ -351,7 +351,7 @@ namespace SixLabors.ImageSharp
         public static Task SaveAsJpegAsync(this Image source, string path, JpegEncoder encoder, CancellationToken cancellationToken) =>
             source.SaveAsync(
                 path,
-                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance),
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(JpegFormat.Instance),
                 cancellationToken);
 
         /// <summary>
@@ -485,7 +485,7 @@ namespace SixLabors.ImageSharp
         public static Task SaveAsPngAsync(this Image source, string path, PngEncoder encoder, CancellationToken cancellationToken) =>
             source.SaveAsync(
                 path,
-                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance),
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(PngFormat.Instance),
                 cancellationToken);
 
         /// <summary>
@@ -619,7 +619,7 @@ namespace SixLabors.ImageSharp
         public static Task SaveAsTgaAsync(this Image source, string path, TgaEncoder encoder, CancellationToken cancellationToken) =>
             source.SaveAsync(
                 path,
-                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance),
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(TgaFormat.Instance),
                 cancellationToken);
 
         /// <summary>

src/ImageSharp/Formats/ImageExtesions.Save.tt

@@ -102,7 +102,7 @@ namespace SixLabors.ImageSharp
         public static Task SaveAs<#= fmt #>Async(this Image source, string path, <#= fmt #>Encoder encoder, CancellationToken cancellationToken) =>
             source.SaveAsync(
                 path,
-                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(BmpFormat.Instance),
+                encoder ?? source.GetConfiguration().ImageFormatsManager.FindEncoder(<#= fmt #>Format.Instance),
                 cancellationToken);
 
         /// <summary>