Fix manual noverlay tests (again)

* src/itree.c (itree_iterator_start): Fix docstring typo.
* test/manual/noverlay/itree-tests.c: Stop defining unused
ITREE_DEBUG.  Replace removed names and APIs with current ones,
e.g. interval_tree_init is now called itree_init, and
itree_iterator_finish no longer exists.  Ensure preconditions of
itree API are satisfied before use, e.g. by zero-initializing
instances of itree_node before inserting them into a tree.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/itree.c b/src/itree.c
index 975f3a8e4fb..688d5c82476 100644
--- a/src/itree.c
+++ b/src/itree.c
@@ -1376,7 +1376,7 @@ itree_iterator_first_node (struct itree_tree *tree,
   return node;
 }
 
-/* Start a iterator enumerating all intervals in [BEGIN,END) in the
+/* Start an iterator enumerating all intervals in [BEGIN,END) in the
    given ORDER.  */
 
 struct itree_iterator *