Issue #28139: Fix messed up indentation

Also update the classmethod and staticmethod doc strings and comments to
match the RST documentation.
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index d059617..3e1a460 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -1967,12 +1967,13 @@
         return 1;
     }
 #endif /* AF_UNIX */
+
 #if defined(AF_NETLINK)
-       case AF_NETLINK:
-       {
-           *len_ret = sizeof (struct sockaddr_nl);
-           return 1;
-       }
+    case AF_NETLINK:
+    {
+        *len_ret = sizeof (struct sockaddr_nl);
+        return 1;
+    }
 #endif
 
 #ifdef AF_RDS