fixup! do not require empty string for optional field

Author: internet-diglett

wicket/src/cli/rack_setup/config_toml.rs

@@ -245,14 +245,15 @@ fn populate_network_table(
     };
 
     if let Some(rack_subnet_address) = config.rack_subnet_address {
-        let value = Value::String(Formatted::new(rack_subnet_address.to_string()));
+        let value =
+            Value::String(Formatted::new(rack_subnet_address.to_string()));
         match table.entry("rack_subnet_address") {
             toml_edit::Entry::Occupied(mut entry) => {
-                entry.insert( Item::Value(value));
-            },
+                entry.insert(Item::Value(value));
+            }
             toml_edit::Entry::Vacant(entry) => {
                 entry.insert(Item::Value(value));
-            },
+            }
         }
     }