diff --git a/netjsonconfig/backends/openwrt/converters/ddns.py b/netjsonconfig/backends/openwrt/converters/ddns.py
index 6547c0b5f..32ea34556 100644
--- a/netjsonconfig/backends/openwrt/converters/ddns.py
+++ b/netjsonconfig/backends/openwrt/converters/ddns.py
@@ -13,9 +13,7 @@ class Ddns(OpenWrtConverter):
     def to_intermediate_loop(self, block, result, index=None):
         if block:
             provider_list = self.__intermediate_providers(block.pop('providers', {}))
-            block.update(
-                {'.type': 'ddns', '.name': block.pop('id', 'global'),}
-            )
+            block.update({'.type': 'ddns', '.name': block.pop('id', 'global')})
             result.setdefault('ddns', [])
             result['ddns'] = [self.sorted_dict(block)] + provider_list
         return result
diff --git a/netjsonconfig/backends/openwrt/schema.py b/netjsonconfig/backends/openwrt/schema.py
index 35f897eba..37b5cb1c8 100644
--- a/netjsonconfig/backends/openwrt/schema.py
+++ b/netjsonconfig/backends/openwrt/schema.py
@@ -476,8 +476,8 @@
                                 "ip_source": {
                                     "type": "string",
                                     "title": "ip_source",
-                                    "description": "specifies the source to detect the local IP: 'network' uses "
-                                    "'ip_network', 'web' uses 'ip_url', 'interface' uses "
+                                    "description": "specifies the source to detect the local IP: "
+                                    "'network' uses 'ip_network', 'web' uses 'ip_url', 'interface' uses "
                                     "'ip_interface', 'script' uses 'ip_script'",
                                     "enum": ["network", "web", "interface", "script"],
                                     "default": "network",
@@ -492,7 +492,8 @@
                                 "domain": {
                                     "type": "string",
                                     "title": "domain",
-                                    "description": "the DNS name to update; this property can also be used for "
+                                    "description": "the DNS name to update;"
+                                    " this property can also be used for "
                                     "special multihost update configurations supported by"
                                     " some providers",
                                     "propertyOrder": 5,
@@ -518,7 +519,8 @@
                                 "update_url": {
                                     "type": "string",
                                     "title": "update_url",
-                                    "description": "url to the DDNS service to use if 'service_name' is not set",
+                                    "description": "url to the DDNS service to use"
+                                    " if 'service_name' is not set",
                                     "propertyOrder": 9,
                                 },
                                 "update_script": {
@@ -530,8 +532,8 @@
                                 "ip_network": {
                                     "type": "string",
                                     "title": "ip_network",
-                                    "description": "network from /etc/config/network to use for detecting the IP "
-                                    "if 'ip_source' is set to 'network'",
+                                    "description": "network from /etc/config/network to use"
+                                    " for detecting the IP if 'ip_source' is set to 'network'",
                                     "default": "wan",
                                     "propertyOrder": 11,
                                 },
@@ -545,15 +547,15 @@
                                 "ip_interface": {
                                     "type": "string",
                                     "title": "ip_interface",
-                                    "description": "local interface to use for detecting the IP if 'ip_source' is"
-                                    " set to 'interface'",
+                                    "description": "local interface to use"
+                                    " for detecting the IP if 'ip_source' is set to 'interface'",
                                     "propertyOrder": 13,
                                 },
                                 "ip_script": {
                                     "type": "string",
                                     "title": "ip_script",
-                                    "description": "script to use for detecting the IP if 'ip_source' is set to "
-                                    "'script'",
+                                    "description": "script to use for detecting the IP"
+                                    " if 'ip_source' is set to 'script'",
                                     "propertyOrder": 14,
                                 },
                                 "use_syslog": {