Fix batch formatting

Author: nblumhardt

sample/Sample/Program.cs

@@ -3,6 +3,9 @@
 using System.Threading;
 using Serilog;
 using Serilog.Core;
+using Serilog.Debugging;
+
+SelfLog.Enable(Console.Error);
 
 // By sharing between the Seq sink and logger itself,
 // Seq API keys can be used to control the level of the whole logging pipeline.

src/Serilog.Sinks.Seq/Serilog.Sinks.Seq.csproj

@@ -29,7 +29,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Serilog" Version="4.2.0-*" />
+    <PackageReference Include="Serilog" Version="4.1.0" />
     <PackageReference Include="Nullable" Version="1.3.1" PrivateAssets="All" />
     <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
   </ItemGroup>

src/Serilog.Sinks.Seq/Sinks/Seq/SeqCompactJsonFormatter.cs

@@ -61,6 +61,17 @@ public SeqCompactJsonFormatter(IFormatProvider? formatProvider = null, JsonValue
     /// <param name="logEvent">The event to format.</param>
     /// <param name="output">The output.</param>
     public void Format(LogEvent logEvent, TextWriter output)
+    {
+        FormatEvent(logEvent, output);
+        output.WriteLine();
+    }
+
+    /// <summary>
+    /// Format the log event into the output, without newline delimiters.
+    /// </summary>
+    /// <param name="logEvent">The event to format.</param>
+    /// <param name="output">The output.</param>
+    public void FormatEvent(LogEvent logEvent, TextWriter output)
     {
         if (logEvent == null) throw new ArgumentNullException(nameof(logEvent));
         if (output == null) throw new ArgumentNullException(nameof(output));