* Properties of the created commit:
* - tree: the result of converting t to a tree object with write_notes_tree().
* - parents: the given parents OR (if NULL) the commit referenced by t->ref.
- * - author/committer: the default determined by commmit_tree().
+ * - author/committer: the default determined by commit_tree().
* - commit message: msg
*
* The resulting commit SHA1 is stored in result_sha1.