@Test
    public void testFormatForUrl() {
        // IPv6 addresses - should add brackets
        assertEquals("[::1]", IpAddressUtil.formatForUrl("::1"));
        assertEquals("[2001:db8::1]", IpAddressUtil.formatForUrl("2001:db8::1"));
        assertEquals("[fe80::1]", IpAddressUtil.formatForUrl("fe80::1"));

        // IPv6 addresses already with brackets - should not double-wrap
        assertEquals("[::1]", IpAddressUtil.formatForUrl("[::1]"));

        }
    }

    /**
     * Formats an IP address string for use in a URL.
     * IPv6 addresses are wrapped in brackets, IPv4 addresses are returned as-is.
     *
     * @param address the IP address string to format
     * @return the formatted address (IPv6 with brackets, IPv4 unchanged)
     */
    public static String formatForUrl(final String address) {
        if (address == null) {
            return null;

",municipalities:["ale","alingsås","alvesta","aneby","arboga","arjeplog","arvidsjaur","arvika","askersund","avesta","bengtsfors","berg","bjurholm","bjuv","boden","bollebygd","bollnäs","borgholm","borlänge","borås","botkyrka","boxholm","bromölla","bräcke","burlöv","båstad","dals-ed","danderyd","degerfors","dorotea","eda","ekerö","eksjö","emmaboda","enköpings","eskilstuna","eslövs","essunga","fagersta","falkenberg","falköping","falu","filipstad","finspång","flen","forshaga","färgelanda","gagnef","...

                .forEach(file -> {
                    try {
                        // The regex `^\\s*\\[\\[(.*)\\]\\]` looks for lines starting with '[[...]]'
                        // and captures the content within the brackets.
                        Files.readAllLines(file).forEach(line -> {
                            if (line.matches("^\\s*\\[\\[(.*)\\]\\].*")) {