change JIS encoding, update test

src/ImageSharp/Metadata/Profiles/Exif/ExifEncodedStringHelpers.cs

@@ -25,7 +25,9 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
 
         private static ReadOnlySpan<byte> UndefinedCodeBytes => new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 };
 
-        private static Encoding JIS0208Encoding => CodePagesEncodingProvider.Instance.GetEncoding(932);
+        // 20932	EUC-JP	Japanese (JIS 0208-1990 and 0212-1990)
+        // https://docs.microsoft.com/en-us/dotnet/api/system.text.encoding?view=net-6.0
+        private static Encoding JIS0208Encoding => CodePagesEncodingProvider.Instance.GetEncoding(20932);
 
         public static bool IsEncodedString(ExifTagValue tag) => tag switch
         {

tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Metadata.cs

@@ -318,7 +318,9 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
                 exif.SetValue(ExifTag.XPKeywords, "Keyword1;Keyword2");
                 exif.SetValue(ExifTag.XPSubject, "This is a subject");
 
-                exif.SetValue(ExifTag.UserComment, new EncodedString(EncodedString.CharacterCode.JIS, "本日は晴天なり(JIS)"));
+                // exif.SetValue(ExifTag.UserComment, new EncodedString(EncodedString.CharacterCode.JIS, "ビッ"));
+                exif.SetValue(ExifTag.UserComment, new EncodedString(EncodedString.CharacterCode.JIS, "eng comment text (JIS)"));
+
                 exif.SetValue(ExifTag.GPSProcessingMethod, new EncodedString(EncodedString.CharacterCode.ASCII, "GPS processing method (ASCII)"));
                 exif.SetValue(ExifTag.GPSAreaInformation, new EncodedString(EncodedString.CharacterCode.Unicode, "GPS area info (Unicode)"));
 
@@ -357,7 +359,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             Assert.Equal("Keyword1;Keyword2", exif.GetValue(ExifTag.XPKeywords).Value);
             Assert.Equal("This is a subject", exif.GetValue(ExifTag.XPSubject).Value);
 
-            Assert.Equal("本日は晴天なり(JIS)", exif.GetValue(ExifTag.UserComment).Value.Text);
+            Assert.Equal("eng comment text (JIS)", exif.GetValue(ExifTag.UserComment).Value.Text);
             Assert.Equal(EncodedString.CharacterCode.JIS, exif.GetValue(ExifTag.UserComment).Value.Code);
 
             Assert.Equal("GPS processing method (ASCII)", exif.GetValue(ExifTag.GPSProcessingMethod).Value.Text);

tests/Images/Input/Jpg/baseline/Calliphora_encoded_strings.jpg

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:9fd6fa56680f00e8834203c8094e79c582c9cc0146b36e7607a6f5453f058237
-size 258078
+oid sha256:59f76d2935a619d128a63d6bfcd5ce9feec492a7f5175327e47554c90b4ec242
+size 258081