test external links

docs.it4i/src/css.css

@@ -2,7 +2,7 @@ a:not([href*="//"]) {
     /* CSS for internal links */
 }
 
-a[href*="//"]:not([href*="code.it4i.cz"]):not([href*="gitlab.it4i.cz"]):after {
+a[href*="//"]:not([href*="*.it4i.cz"]) {
     /*CSS for external links */
     background: transparent url("/img/external.png") no-repeat right 0px top 1px;
     background-size: 12px;