Replace unwrap by ?

Author: cruessler

gitoxide-core/src/repository/diff.rs

@@ -10,16 +10,12 @@ pub fn tree(
     let new_tree_id = repo.rev_parse_single(new_treeish.as_bstr())?;
 
     let old_tree = old_tree_id
-        .object()
-        .unwrap()
-        .peel_to_kind(gix::object::Kind::Tree)
-        .unwrap()
+        .object()?
+        .peel_to_kind(gix::object::Kind::Tree)?
         .into_tree();
     let new_tree = new_tree_id
-        .object()
-        .unwrap()
-        .peel_to_kind(gix::object::Kind::Tree)
-        .unwrap()
+        .object()?
+        .peel_to_kind(gix::object::Kind::Tree)?
         .into_tree();
 
     let changes = repo.diff_tree_to_tree(&old_tree, &new_tree, None)?;