(search) Fix rare exception in scribe.rip substitution

code/services-application/search-service-legacy/java/nu/marginalia/search/SearchOperator.java

@@ -200,14 +200,16 @@ public class SearchOperator {
             }
         }
         else if (topdomain.equals("medium.com")) {
+            int slashIndex = path.indexOf("/", 1);
+            if (slashIndex >= 0) {
                 if (!subdomain.isBlank()) {
                     return new EdgeUrl("https", new EdgeDomain("scribe.rip"), null, path, null);
                 }
                 else {
-                String article = path.substring(path.indexOf("/", 1));
+                    String article = path.substring(slashIndex);
                     return new EdgeUrl("https", new EdgeDomain("scribe.rip"), null, article, null);
                 }
-
+            }
         }
         return url;
     }

code/services-application/search-service/java/nu/marginalia/search/SearchOperator.java

@@ -231,12 +231,12 @@ public class SearchOperator {
             }
         }
         else if (topdomain.equals("medium.com")) {
+            int slashIndex = path.indexOf("/", 1);
+            if (slashIndex >= 0) {
                 if (!subdomain.isBlank()) {
                     return new EdgeUrl("https", new EdgeDomain("scribe.rip"), null, path, null);
                 }
                 else {
-                int slashIndex = path.indexOf("/", 1);
-                if (slashIndex >= 0) {
                     String article = path.substring(slashIndex);
                     return new EdgeUrl("https", new EdgeDomain("scribe.rip"), null, article, null);
                 }