[3.12] Prefer "similar" over "equivalent" in tutorial (GH-125343)

Doc/tutorial/datastructures.rst

@@ -19,13 +19,13 @@ objects:
 .. method:: list.append(x)
    :noindex:
 
-   Add an item to the end of the list.  Equivalent to ``a[len(a):] = [x]``.
+   Add an item to the end of the list.  Similar to ``a[len(a):] = [x]``.
 
 
 .. method:: list.extend(iterable)
    :noindex:
 
-   Extend the list by appending all the items from the iterable.  Equivalent to
+   Extend the list by appending all the items from the iterable.  Similar to
    ``a[len(a):] = iterable``.
 
 
@@ -56,7 +56,7 @@ objects:
 .. method:: list.clear()
    :noindex:
 
-   Remove all items from the list.  Equivalent to ``del a[:]``.
+   Remove all items from the list.  Similar to ``del a[:]``.
 
 
 .. method:: list.index(x[, start[, end]])
@@ -93,7 +93,7 @@ objects:
 .. method:: list.copy()
    :noindex:
 
-   Return a shallow copy of the list.  Equivalent to ``a[:]``.
+   Return a shallow copy of the list.  Similar to ``a[:]``.
 
 
 An example that uses most of the list methods::