Repair some clippy lints

These seem to be new with the Rust 1.62.0 toolchain.

src/cmd/import.rs

@@ -746,7 +746,7 @@ impl Headers {
                     let (name, email) = value
                         .to_str()
                         .map_err(|_| anyhow!("From/Author is not UTF-8"))
-                        .and_then(|s| signature::parse_name_email(s).map_err(|e| e))
+                        .and_then(signature::parse_name_email)
                         .context("parsing From/Author header")?;
                     headers.author_name = Some(name.to_string());
                     headers.author_email = Some(email.to_string());

src/patchrange.rs

@@ -2,7 +2,7 @@
 
 //! Parse user-provided patch ranges.
 
-use std::str::FromStr;
+use std::{fmt::Write, str::FromStr};
 
 use crate::{patchname::PatchName, stack::StackStateAccess};
 
@@ -440,9 +440,9 @@ fn similar_patchnames(patchname: &PatchName, allowed_patchnames: &[&PatchName])
     } else {
         let mut similar_str = String::new();
         for pn in similar[..similar.len() - 1].iter() {
-            similar_str.push_str(&format!("`{pn}`, "));
+            write!(&mut similar_str, "`{pn}`, ").unwrap();
         }
-        similar_str.push_str(&format!("and `{}`", similar[similar.len() - 1]));
+        write!(&mut similar_str, "and `{}`", similar[similar.len() - 1]).unwrap();
         Some(similar_str)
     }
 }