matrix: fix whitespace

matrix.nix

@@ -16,7 +16,7 @@ let
       brand = "Maxwell matrix";
       defaultCountryCode = "IT";
       showLabsSettings = true;
-      
+
       # Use a trusted Jitsi instance
       jitsi.preferredDomain = "jitsi.openspeed.org";
       jitsi.externalApiUrl  = "https://jitsi.openspeed.org/libs/external_api.min.js";
@@ -117,7 +117,7 @@ in
                filters: [context]
                SYSLOG_IDENTIFIER: synapse
        root:
-           level: WARN 
+           level: WARN
            handlers: [journal]
        disable_existing_loggers: False
     '';
@@ -131,7 +131,7 @@ in
     # Needed to restrict access to the TURN
     # server to only our matrix users.
     turn_shared_secret = config.secrets.matrix.turn;
-    # Needed by the register_new_matrix_user script 
+    # Needed by the register_new_matrix_user script
     registration_shared_secret = config.secrets.matrix.registration;
   };
 
@@ -153,13 +153,13 @@ in
   # needed for reliable VoIP.
   services.coturn = {
     enable = true;
- 
+
     # Only allow users vouched for
     # by the Matrix server.
     lt-cred-mech       = true;
     use-auth-secret    = true;
     static-auth-secret = config.secrets.matrix.turn;
- 
+
     # Use maxwell certificate for TLS
     realm = config.var.hostname;
     cert = "/var/lib/acme/${config.var.hostname}/fullchain.pem";
@@ -167,12 +167,12 @@ in
 
     # Port range for TURN relaying
     min-port = 49152;
-    max-port = 49999; 
- 
+    max-port = 49999;
+
     # Enable TLS
     secure-stun  = true;
     no-tcp-relay = false;
- 
+
     extraConfig = ''
       external-ip=${config.var.ipAddress}
       cipher-list=HIGH