From 763e57633ab99c91fab4816573e6d313c5bd7e90 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Sat, 1 Oct 2022 12:34:04 +0200
Subject: [PATCH] note that a commit is not a descendant of itself

---
 src/repo.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/repo.rs b/src/repo.rs
index 3aeac2f1f5..92e1a7f9d5 100644
--- a/src/repo.rs
+++ b/src/repo.rs
@@ -2418,6 +2418,9 @@ impl Repository {
     }
 
     /// Determine if a commit is the descendant of another commit
+    ///
+    /// Note that a commit is not considered a descendant of itself, in contrast
+    /// to `git merge-base --is-ancestor`.
     pub fn graph_descendant_of(&self, commit: Oid, ancestor: Oid) -> Result<bool, Error> {
         unsafe {
             let rv = try_call!(raw::git_graph_descendant_of(