Update reports.lua

As discussed on discord

modules/control/reports.lua

@@ -132,7 +132,7 @@ function Reports.report_player(player, by_player_name, reason)
     if not player then return end
     local player_name = player.name
 
-    if reason == nil or not reason:find("/S") then reason = 'No reason given' end
+    if reason == nil or not reason:find("%S") then reason = 'No reason given' end
 
     local reports = user_reports[player_name]
     if not reports then
@@ -222,4 +222,4 @@ function Reports.remove_all(player, removed_by_name)
     return true
 end
 
-return Reports
+return Reports