Remove trailing +

group_vars/matrix_servers

@@ -5371,7 +5371,6 @@ matrix_synapse_admin_config_asManagedUsers_auto: |
       '^@'+(matrix_steam_bridge_appservice_bot_username | default('') | regex_escape)+':'+(matrix_domain | regex_escape)+'$',
       '^@steam_[a-zA-Z0-9]+:'+(matrix_domain | regex_escape)+'$',
     ] if matrix_steam_bridge_enabled else [])
-    +
   }}
 
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