add noit always newline on template

internal/pkg/overlay/overlay.go

@@ -356,14 +356,14 @@ func BuildOverlayIndir(nodeInfo node.NodeInfo, overlayNames []string, outputDir
 					var fileBuffer bytes.Buffer
 					// search for magic file name comment
 					fileScanner := bufio.NewScanner(bytes.NewReader(buffer.Bytes()))
-					fileScanner.Split(bufio.ScanLines)
+					fileScanner.Split(scanLines)
 					reg := regexp.MustCompile(`.*{{\s*/\*\s*file\s*["'](.*)["']\s*\*/\s*}}.*`)
 					foundFileComment := false
 					for fileScanner.Scan() {
 						line := fileScanner.Text()
 						filenameFromTemplate := reg.FindAllStringSubmatch(line, -1)
 						if len(filenameFromTemplate) != 0 {
-							wwlog.Printf(wwlog.DEBUG, "Found multifle comment, new filename %s\n", filenameFromTemplate[0][1])
+							wwlog.Printf(wwlog.DEBUG, "Found multifile comment, new filename %s\n", filenameFromTemplate[0][1])
 							if foundFileComment {
 								err = carefulWriteBuffer(path.Join(outputDir, destFileName),
 									fileBuffer, backupFile, info.Mode())
@@ -379,7 +379,7 @@ func BuildOverlayIndir(nodeInfo node.NodeInfo, overlayNames []string, outputDir
 							destFileName = path.Join(path.Dir(destFile), filenameFromTemplate[0][1])
 							foundFileComment = true
 						} else {
-							_, _ = fileBuffer.WriteString(line + "\n")
+							_, _ = fileBuffer.WriteString(line)
 						}
 					}
 					err = carefulWriteBuffer(path.Join(outputDir, destFileName), fileBuffer, backupFile, info.Mode())
@@ -449,3 +449,20 @@ func carefulWriteBuffer(destFile string, buffer bytes.Buffer, backupFile bool, p
 	_, err = buffer.WriteTo(w)
 	return err
 }
+
+// Simple version of ScanLines, but include the line break
+func scanLines(data []byte, atEOF bool) (advance int, token []byte, err error) {
+	if atEOF && len(data) == 0 {
+		return 0, nil, nil
+	}
+	if i := bytes.IndexByte(data, '\n'); i >= 0 {
+		// We have a full newline-terminated line.
+		return i + 1, data[0 : i+1], nil
+	}
+	// If we're at EOF, we have a final, non-terminated line. Return it.
+	if atEOF {
+		return len(data), data, nil
+	}
+	// Request more data.
+	return 0, nil, nil
+}