Update README.md

.github/README.md

@@ -35,7 +35,8 @@ Jeg forsikrer dere også om at det såklart er fullt mulig å kontakte meg om ad
 • [Recentmost tool I used to test IP server availability](https://github.com/funilrys/PyFunceble), made by [Funilrys](https://github.com/funilrys). (I previously used the _Find dead, redirected and/or parked domains_ tool at https://arestwo.org/famlam/redundantRuleChecker.html to great effect, but it had a ludicrously long and hardcoded 120sec waiting time before it'd label domains as dead). <br>
 • To create direct addition links that can be linked to on GitHub, I don't use _abp:subscribe_ in the URLs, but instead _subscribe.adblockplus.org_, which works the same way if the addition link has been correctly constructed. <br>
 • To easily create GitCDN links to the lists, in case anyone have list connection problems: [GitHub GitCDN Button](https://greasyfork.org/scripts/373361-github-gitcdn-button) by [mikhoul](https://greasyfork.org/users/3930-mikhoul) <br>
-• To find very similar domains for Hosts files, or to find all domains hosted by specific IP addresses (both IPv4 and IPv6): [SecurityTrails](https://securitytrails.com/)
+• To find very similar domains for Hosts files, or to find all domains hosted by specific IP addresses (both IPv4 and IPv6): [SecurityTrails](https://securitytrails.com/) <br>
+• To look for invalidly written entries according to Nano/uBO's syntax: Use Nano Adblocker, set logger to *All*, and resync the lists.
 
 ### Ways one can use [Sublime Text](https://www.sublimetext.com/) (made by Jon Skinner and Will Bond) to improve his/her filter lists: