We have hardcoded Unix-style newlines in PluginInfo.toString. We should use `System.lineSeparator()` instead.
server/src/main/java/org/elasticsearch/plugins/PluginInfo.java
* Other plugins this plugin extends through SPI.
     *
     * @return the names of the plugins extended
     */
    public List<String> getExtendedPlugins() {
        return extendedPlugins;
    }
    /**
     * The version of the plugin
     *
     * @return the version
     */
    public String getVersion() {
        return version;
    }
    /**
     * The version of Elasticsearch the plugin was built for.
     *
     * @return an Elasticsearch version
     */
    public Version getElasticsearchVersion() {
        return elasticsearchVersion;
    }
    /**
     * The version of Java the plugin was built with.
     *
     * @return a java version string
     */
    public String getJavaVersion() {
        return javaVersion;