chore: Improve docstrings

Took 23 minutes

src/encoding/evm/approvals/permit2.rs

@@ -149,7 +149,7 @@ impl Permit2 {
             ))),
         }
     }
-    /// Creates permit single and signature
+    /// Creates permit single
     pub fn get_permit(
         &self,
         spender: &Bytes,

src/encoding/evm/encoder_builders.rs

@@ -65,6 +65,9 @@ impl TychoRouterEncoderBuilder {
         self
     }
 
+    /// Sets the `signer` for the encoder. This is used to sign permit2 objects. This is only needed
+    /// if you intend to get the full calldata for the transfer. We do not recommend using this
+    /// option, you should sign and create the function calldata entirely on your own.
     pub fn signer(mut self, signer: PrivateKeySigner) -> Self {
         self.signer = Some(signer);
         self

src/encoding/evm/tycho_encoders.rs

@@ -271,7 +271,6 @@ impl TychoEncoder for TychoRouterEncoder {
 ///
 /// # Fields
 /// * `swap_encoder_registry`: Registry of swap encoders
-/// * `native_address`: Address of the chain's native token
 #[derive(Clone)]
 pub struct TychoExecutorEncoder {
     swap_encoder_registry: SwapEncoderRegistry,