make line endings in generated files oncistent with git settings

gen/DocumentFormat.OpenXml.Generator.Models/Generators/Linq/LinqGeneratorExtensions.cs

@@ -60,7 +60,7 @@ public static class LinqGeneratorExtensions
 
             var className = GetClassName(prefix);
 
-            using var output = new StringWriter();
+            using var output = new StringWriter() { NewLine = "\n" };
 
             GenerateClassFilePreamble(output);
             GenerateClass(output, prefix, namespaceName, classFieldInfos, fieldInfos);

gen/DocumentFormat.OpenXml.Generator/NamespaceGeneration/NamespaceGeneratorExtensions.cs

@@ -11,7 +11,7 @@ internal static class NamespaceGeneratorExtensions
 {
     public static string Generate(this IEnumerable<NamespaceInfo> namespaces)
     {
-        var sb = new StringWriter();
+        var sb = new StringWriter() { NewLine = "\n" };
         var writer = new IndentedTextWriter(sb);
 
         writer.WriteFileHeader();

gen/DocumentFormat.OpenXml.Generator/PackageGeneratorExtensions.cs

@@ -80,7 +80,7 @@ public OpenXmlPackageAttribute(string packageType)
             var features = builder.Build(gContext).ToList();
 
             var sb = new StringBuilder();
-            var writer = new IndentedTextWriter(new StringWriter(sb));
+            var writer = new IndentedTextWriter(new StringWriter(sb) { NewLine = "\n" });
 
             foreach (var feature in features)
             {

gen/DocumentFormat.OpenXml.Generator/PartGenerator.cs

@@ -19,7 +19,7 @@ public static void WritePartFiles(SourceProductionContext context, OpenXmlGenera
         }
 
         var sb = new StringBuilder();
-        var sw = new StringWriter(sb);
+        var sw = new StringWriter(sb) { NewLine = "\n" };
         var writer = new IndentedTextWriter(sw);
 
         foreach (var part in openXml.DataSource.Parts.Concat(openXml.DataSource.Packages))

gen/DocumentFormat.OpenXml.Generator/SchemaGenerator.cs

@@ -14,7 +14,7 @@ public static class SchemaGenerator
 {
     public static void WriteSchemaFiles(SourceProductionContext context, OpenXmlGeneratorServices openXml, SchemaNamespace namespaces)
     {
-        var sw = new StringWriter();
+        var sw = new StringWriter() { NewLine = "\n" };
         var writer = new IndentedTextWriter(sw);
 
         writer.WriteFileHeader();