Issue #17047: removed doubled words in Doc/*, Mac/*, and Tool/*
found by Serhiy Storchaka and Matthew Barnett
diff --git a/Doc/library/xml.dom.rst b/Doc/library/xml.dom.rst
index 1069615..565dc84 100644
--- a/Doc/library/xml.dom.rst
+++ b/Doc/library/xml.dom.rst
@@ -374,7 +374,7 @@
Add a new child node to this node at the end of the list of
children, returning *newChild*. If the node was already in
- in the tree, it is removed first.
+ the tree, it is removed first.
.. method:: Node.insertBefore(newChild, refChild)