diff --git a/abrechenbarkeit.lua b/abrechenbarkeit.lua
index 41b4e8f..5bdd4ab 100755
--- a/abrechenbarkeit.lua
+++ b/abrechenbarkeit.lua
@@ -536,8 +536,8 @@ local function r_users(show_special, filter_negative)
 	end
 
     return respond(200, "Abrechenbarkeit", function()
-		local users = get_active_users()
-    
+        local users = get_active_users()
+
         if not show_special then
             print(format([[
                 <form class="section" action="/" method="GET" id="user_creation">
@@ -548,34 +548,34 @@ local function r_users(show_special, filter_negative)
                 </form>
             ]]))
 
-			-- get first letters
-			local firstletters = {}
-			local function contains(char)
-				for _, firstchar in ipairs(firstletters) do
-					if firstchar == char then
-						return true
-					end
-				end
+            -- get first letters
+            local firstletters = {}
+            local function contains(char)
+                for _, firstchar in ipairs(firstletters) do
+                    if firstchar == char then
+                        return true
+                    end
+                end
 
-				return false
-			end
-			
-	        for _, user in ipairs(users) do
-	        	user.firstchar = user.name:sub(1,1):lower()
-				if user.firstchar ~= "@" and not contains(user.firstchar) then
-					table.insert(firstletters, user.firstchar)
-				end
-    		end
+                return false
+            end
 
-    		table.sort(firstletters)
+            for _, user in ipairs(users) do
+                user.firstchar = user.name:sub(1, 1):lower()
+                if user.firstchar ~= "@" and not contains(user.firstchar) then
+                    table.insert(firstletters, user.firstchar)
+                end
+            end
+
+            table.sort(firstletters)
 
             print(format([[<section class="firstletterlist"><h3>{+users.filter}</h3><ul>]]))
-    		for k, letter in ipairs(firstletters) do
-    			print(format([[<li><a href="?users&prefix={letter}">{letter}</a></li>]], {
-    				letter = letter,
-    			}))
-    		end
-    		print([[</ul></section>]])
+            for k, letter in ipairs(firstletters) do
+                print(format([[<li><a href="?users&prefix={letter}">{letter}</a></li>]], {
+                    letter = letter,
+                }))
+            end
+            print([[</ul></section>]])
         end
         print([[<div class="userlist"></div>]]) -- for printing
         print([[<ul class="userlist">]])
@@ -624,7 +624,9 @@ local function r_users(show_special, filter_negative)
 
         	return
         end
-        print(format([[<details><summary>{+users.inactive_list}</summary><ul class="userlist">]]))
+        print(format([[
+            <details {oclass}><summary>{+users.inactive_list}</summary><ul class="userlist">
+        ]], { oclass = query.prefix and "open" or "" }))
         for _, user in ipairs(users) do
             if user.time <= inactive_cutoff then show_user(user) end
         end