The link to the "Search Command Style Guide" is broken; it just redirects to dev.splunk.com. I don't see any obvious place where this page is now in the latest custom search command doc. I was able to dig up the last-known non-redirect content from the Wayback Machine: http://web.archive.org/web/20151207184958/http://docs.splunk.com/Documentation/Splunk/latest/Search/Searchcommandstyleguide