stabletailgraph: clarify naiveness of current implementation

Both the naive and the actual versions of the algorithms are going to co-exist
for the tests. This makes is clearer that this one is naive.

mercurial/debugcommands.py

@@ -3671,7 +3671,7 b' def debug_stable_tail_sort(ui, repo, rev'
     cl = repo.changelog
 
     displayer = logcmdutil.maketemplater(ui, repo, template)
-    sorted_revs = stabletailsort._stable_tail_sort(cl, rev)
+    sorted_revs = stabletailsort._stable_tail_sort_naive(cl, rev)
     for ancestor_rev in sorted_revs:
         displayer.show(repo[ancestor_rev])
 

mercurial/stabletailgraph/stabletailsort.py

@@ -74,7 +74,7 b' def _nonoedipal_parent_revs(cl, rev):'
         return p1, p2
 
 
-def _stable_tail_sort(cl, head_rev):
+def _stable_tail_sort_naive(cl, head_rev):
     """
     Naive topological iterator of the ancestors given by the stable-tail sort.
 
@@ -103,7 +103,9 b' def _stable_tail_sort(cl, head_rev):'
                 cl.parentrevs, (pt,), inclusive=True
             )
             exclusive_ancestors = (
-                a for a in _stable_tail_sort(cl, px) if a not in tail_ancestors
+                a
+                for a in _stable_tail_sort_naive(cl, px)
+                if a not in tail_ancestors
             )
 
             excl_part_size = cl.fast_rank(cursor_rev) - cl.fast_rank(pt) - 1