tail.setI(bli);
if (cmd.hasOption("o")) {
tail.setRenderer(PrintfRenderer.parse(cmd.getOptionValue("o")));
} else if (cmd.hasOption("d")) {
tail.setRenderer(new DebugRenderer());
} else {
Renderer<Line> renderer = format.getLineRenderer();
if (files.size() > 1 && renderer instanceof FieldRenderer) {
FieldRenderer fieldRenderer = (FieldRenderer) renderer;
fieldRenderer.prependColumn(LogConstants.FILE_NAME, IoUtil.getMaxFilenameWidth(files));