Make generated json files end with newlines (#2087)

internal/docs/sample_event.go

@@ -5,6 +5,7 @@
 package docs
 
 import (
+	"bytes"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -54,7 +55,7 @@ func renderSampleEvent(packageRoot, dataStreamName string) (string, error) {
 			stripDataStreamFolderSuffix(dataStreamName)))
 	}
 	builder.WriteString("```json\n")
-	builder.Write(formatted)
+	builder.Write(bytes.TrimSpace(formatted))
 	builder.WriteString("\n```")
 	return builder.String(), nil
 }

internal/testrunner/runners/pipeline/testresult.go

@@ -38,7 +38,7 @@ func writeTestResult(testCasePath string, result *testResult, specVersion semver
 	if err != nil {
 		return fmt.Errorf("marshalling test result failed: %w", err)
 	}
-	err = os.WriteFile(filepath.Join(testCaseDir, expectedTestResultFile(testCaseFile)), data, 0644)
+	err = os.WriteFile(filepath.Join(testCaseDir, expectedTestResultFile(testCaseFile)), append(data, '\n'), 0644)
 	if err != nil {
 		return fmt.Errorf("writing test result failed: %w", err)
 	}

internal/testrunner/runners/system/tester.go

@@ -2016,7 +2016,7 @@ func writeSampleEvent(path string, doc common.MapStr, specVersion semver.Version
 		return fmt.Errorf("marshalling sample event failed: %w", err)
 	}
 
-	err = os.WriteFile(filepath.Join(path, "sample_event.json"), body, 0644)
+	err = os.WriteFile(filepath.Join(path, "sample_event.json"), append(body, '\n'), 0644)
 	if err != nil {
 		return fmt.Errorf("writing sample event failed: %w", err)
 	}

test/packages/parallel/ti_anomali_logsdb/docs/README.md

@@ -137,7 +137,6 @@ An example event for `threatstream` looks as following:
         }
     }
 }
-
 ```
 
 **Exported fields**