delta-find: clarify that revisioninfo.p1/p2 constains nodeid

This clarify the content of these attributes.

mercurial/revlogutils/__init__.py

@@ -65,7 +65,7 b' def entry('
 class revisioninfo:
     """Information about a revision that allows building its fulltext
     node:       expected hash of the revision
-    p1, p2:     parent revs of the revision
+    p1, p2:     parent revs of the revision (as node)
     btext:      built text cache consisting of a one-element list
     cachedelta: (baserev, uncompressed_delta, usage_mode) or None
     flags:      flags associated to the revision storage