RESOLVED - issue BATCH-1320: New line special character in Header

http://jira.springframework.org/browse/BATCH-1320

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/FlatFileItemWriter.java

@@ -259,7 +259,7 @@ public class FlatFileItemWriter<T> extends ExecutionContextUserSupport implement
 			if (headerCallback != null) {
 				try {
 					headerCallback.writeHeader(outputState.outputBufferedWriter);
-					outputState.write("\n");
+					outputState.write(lineSeparator);
 				}
 				catch (IOException e) {
 					throw new ItemStreamException("Could not write headers.  The file may be corrupt.", e);

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/file/FlatFileItemWriterTests.java

@@ -85,6 +85,7 @@ public class FlatFileItemWriterTests {
 		outputFile = File.createTempFile("flatfile-test-output-", ".tmp");
 
 		writer.setResource(new FileSystemResource(outputFile));
+		writer.setLineSeparator("\n");
 		writer.setLineAggregator(new PassThroughLineAggregator<String>());
 		writer.afterPropertiesSet();
 		writer.setSaveState(true);