Issue #27416: clarify copy doc

Patch written by R. David Murray.
diff --git a/Doc/library/copy.rst b/Doc/library/copy.rst
index 0f23a95..a5378e5 100644
--- a/Doc/library/copy.rst
+++ b/Doc/library/copy.rst
@@ -44,7 +44,7 @@
   reference to themselves) may cause a recursive loop.
 
 * Because deep copy copies *everything* it may copy too much, e.g.,
-  administrative data structures that should be shared even between copies.
+  even administrative data structures that should be shared even between copies.
 
 The :func:`deepcopy` function avoids these problems by: