Z:gnu-www-ja-fsf-html-style-sheet--a2e4e2-Don't use just a directory nam/en

Don't use just a directory name in a URL; always include the specific file name. E.g., use "/gnu/gnu-history.html" not just "/gnu/". Never use "index.html" in a URL. Both of these are kindnesses to the users, as browsers change the highlighting on a link if a user has already seen it. If the link is known by several different file names, the user will not get a highlighted link on the file names the user hasn't explicitly referenced. So the user goes to pages the user has already seen, which is irritating. Also, this helps mirroring.