private void checkIgnoredFileForMarkup(File file) throws IOException {
		if (!file.exists()) {
			log.warning(String.format("Excluded file %s doesn't exist", file));
			return;
		}
		try (BufferedReader is = new BufferedReader(new FileReader(file))) {
			String line = null;
			while ((line = is.readLine()) != null) {
				if (line.contains("//-") ||
					line.contains("//+")) {
					log.warning("Excluded file " + file + " appears to contain markup");
					return;	// Only natter once per file
				}
			}
		}
	}