DOC: improve clarity of Copy-on-Write

Author: whyvineet

pandas/core/generic.py

@@ -6542,12 +6542,11 @@ def copy(self, deep: bool = True) -> Self:
 
         When ``deep=False``, a new object will be created without copying
         the calling object's data or index (only references to the data
-        and index are copied). With Copy-on-Write enabled by default,
-        changes to the data of the original will *not* be reflected in the
-        shallow copy (and vice versa). The shallow copy uses a lazy (deferred)
-        copy mechanism that copies the data only when any changes to the
-        original or shallow copy are made, ensuring memory efficiency while
-        maintaining data integrity.
+        and index are copied). With Copy-on-Write, changes to the data of the
+        original will *not* be reflected in the shallow copy (and vice versa).
+        The shallow copy uses a lazy (deferred) copy mechanism that copies the
+        data only when any changes to the original or shallow copy are made,
+        ensuring memory efficiency while maintaining data integrity.
 
         .. note::
             In pandas versions prior to 3.0, the default behavior without