style: split strings instead of backslash strings

cubicweb/cwconfig.py

@@ -984,8 +984,7 @@ class CubicWebConfiguration(CubicWebNoAppConfiguration):
             {
                 "type": "string",
                 "default": Method("default_instance_id"),
-                "help": "name used as HELO name for outgoing emails from the \
-repository.",
+                "help": "name used as HELO name for outgoing emails from the repository.",
                 "group": "email",
                 "level": 2,
             },
@@ -995,8 +994,10 @@ repository.",
             {
                 "type": "string",
                 "default": "cubicweb@mydomain.com",
-                "help": "email address used as HELO address for outgoing emails from \
-the repository",
+                "help": (
+                    "email address used as HELO address for outgoing emails from the "
+                    "repository"
+                ),
                 "group": "email",
                 "level": 1,
             },
@@ -1006,7 +1007,10 @@ the repository",
             {
                 "type": "int",
                 "default": 0,
-                "help": "interval (in seconds) at which stats are dumped in the logstat file; set 0 to disable",
+                "help": (
+                    "interval (in seconds) at which stats are dumped in the logstat file; set 0 to "
+                    "disable"
+                ),
                 "group": "main",
                 "level": 2,
             },