Save an allocation

Author: jwodder

src/commands/release.rs

@@ -273,7 +273,7 @@ impl Release {
         let Some(mut readme) = readme_file.get()? else {
             bail!("README.md suddenly disappeared!");
         };
-        if readme.ensure_changelog_link(&ghrepo, &default_branch) {
+        if readme.ensure_changelog_link(&ghrepo, default_branch) {
             log::info!("Adding Changelog link to README.md ...");
             readme_file.set(readme)?;
         }

src/git.rs

@@ -138,13 +138,13 @@ impl<'a> Git<'a> {
     }
 
     // Returns None if the default branch could not be determined
-    pub(crate) fn default_branch(&self) -> Result<Option<String>, CommandOutputError> {
+    pub(crate) fn default_branch(&self) -> Result<Option<&'static str>, CommandOutputError> {
         let branches = self
             .readlines("branch", ["--format=%(refname:short)"])?
             .collect::<HashSet<_>>();
         for guess in ["main", "master"] {
             if branches.contains(guess) {
-                return Ok(Some(guess.to_owned()));
+                return Ok(Some(guess));
             }
         }
         Ok(None)