refactor keymap map visitor to reduce # of cases

helix-term/src/keymap.rs

@@ -218,20 +218,16 @@ impl<'de> serde::de::Visitor<'de> for KeyTrieVisitor {
         match command {
             None => Ok(KeyTrie::Node(KeyTrieNode::new(label, mapping, order))),
             Some(cmd) => {
-                if label.is_empty() {
-                    Ok(KeyTrie::Leaf(cmd))
-                } else {
-                    match cmd {
-                        MappableCommand::Typable { name, args, .. } => {
+                let status = (cmd, label.is_empty());
+                if let (MappableCommand::Typable { name, args, .. }, false) = status {
                     Ok(MappableCommand::Typable {
                         name,
                         args,
                         doc: label.to_string(),
                     })
                     .map(KeyTrie::Leaf)
-                        }
-                        MappableCommand::Static { .. } => Ok(KeyTrie::Leaf(cmd)),
-                    }
+                } else {
+                    Ok(KeyTrie::Leaf(status.0))
                 }
             }
         }