file("build/tmp/javadoc/javadoc.options").assertContents(containsNormalizedString("-addMultilineStringsOption 'a'\n" +
            "-addMultilineStringsOption 'b'\n" +
            "-addMultilineStringsOption 'c'"))

        file("build/tmp/javadoc/javadoc.options").assertContents(containsNormalizedString("""-addStringsOption 'a b c'"""))

        return addOption(new StringsJavadocOptionFileOption(option, new ArrayList<>(), joinBy));
    }

    public JavadocOptionFileOption<List<String>> addMultilineStringsOption(String option) {
        return addOption(new MultilineStringsJavadocOptionFileOption(option, new ArrayList<>()));
    }

    public JavadocOptionFileOption<Boolean> addBooleanOption(String option) {

     * <p>
     * {@code addMultilineStringsOption("foo").setValue(["a", "b", "c"])} will produce the command-line
     * </p>
     * <pre>
     *     -foo 'a'
     *     -foo 'b'
     *     -foo 'c'
     * </pre>
     * @param option command-line option
     */
    public JavadocOptionFileOption<List<String>> addMultilineStringsOption(String option) {

        charSet = addStringOption(OPTION_CHARSET);
        docEncoding = addStringOption(OPTION_DOENCODING);
        keyWords = addBooleanOption(OPTION_KEYWORDS);
        tags = addMultilineStringsOption(OPTION_TAG);
        taglets = addMultilineStringsOption(OPTION_TAGLET);
        tagletPath = addPathOption(OPTION_TAGLETPATH);
        docFilesSubDirs = addBooleanOption(OPTION_DOCFILESSUBDIRS);