Comments in KeysScan.md to prevent copy/paste fatalities

Docs/KeysScan.md

@@ -38,10 +38,15 @@ So how do I use them?
 
 Simple: start from a server, not a database.
 
+    // get the target server
     var server = conn.GetServer(someServer);
+
+	// show all keys in database 0 that include "foo" in their name
     foreach(var key in server.Keys(pattern: "*foo*")) {
         Console.WriteLine(key);
     }
+
+	// completely wipe ALL keys from database 0
     server.FlushDatabase();
 
 Note that unlike the `IDatabase` API (where the target database has already been selected in the `GetDatabase()` call), these methods take an optional parameter for the database, or it defaults to `0`.