Integration of importdocs from the features/pep-420 repo.
diff --git a/Doc/reference/index.rst b/Doc/reference/index.rst
index bd1a281..87166f8 100644
--- a/Doc/reference/index.rst
+++ b/Doc/reference/index.rst
@@ -24,6 +24,7 @@
    lexical_analysis.rst
    datamodel.rst
    executionmodel.rst
+   import_machinery.rst
    expressions.rst
    simple_stmts.rst
    compound_stmts.rst