config: preserve spacing when rewriting config

pkg/connector/config.go

@@ -98,7 +98,17 @@ func upgradeConfig(helper up.Helper) {
 }
 
 func (tg *TelegramConnector) GetConfig() (example string, data any, upgrader up.Upgrader) {
-	return ExampleConfig, tg.Config, up.SimpleUpgrader(upgradeConfig)
+	return ExampleConfig, tg.Config, &up.StructUpgrader{
+		SimpleUpgrader: up.SimpleUpgrader(upgradeConfig),
+		Blocks: [][]string{
+			{"device_info"},
+			{"animated_sticker"},
+			{"member_list"},
+			{"ping"},
+			{"sync"},
+		},
+		Base: ExampleConfig,
+	}
 }
 
 func (tg *TelegramConnector) ValidateConfig() error {

pkg/connector/example-config.yaml

@@ -2,6 +2,7 @@
 api_id: 12345
 api_hash: tjyd5yge35lbodk1xwzw2jstp90k55qz
 
+# Device info shown in the Telegram device list.
 device_info:
     device_model: mautrix-telegram
     system_version:
@@ -37,17 +38,14 @@ member_list:
     #
     # -1 means no limit (which means it's limited to 10000 by the server)
     max_initial_sync: 100
-
     # Whether or not to sync the member list in broadcast channels. If
     # disabled, members will still be synced when they send messages.
     #
     # If no channel admins have logged into the bridge, the bridge won't be
     # able to sync the member list regardless of this setting.
     sync_broadcast_channels: false
-
     # Whether or not to skip deleted members when syncing members.
     skip_deleted: true
-
 # Maximum number of participants in chats to bridge. Only applies when the
 # portal is being created. If there are more members when trying to create a
 # room, the room creation will be cancelled.