python · Mariatta · Feb 25, 2017 · Feb 24, 2017 · Feb 24, 2017
diff --git a/Doc/tutorial/datastructures.rst b/Doc/tutorial/datastructures.rst
@@ -22,11 +22,11 @@ objects:
   Add an item to the end of the list.  Equivalent to ``a[len(a):] = [x]``.


-.. method:: list.extend(L)
+.. method:: list.extend(iterable)
   :noindex:

-   Extend the list by appending all the items in the given list.  Equivalent to
-   ``a[len(a):] = L``.
+   Extend the list by appending all the items from the iterable.  Equivalent to
+   ``a[len(a):] = iterable``.


 .. method:: list.insert(i, x)
@@ -68,7 +68,7 @@ objects:

   The optional arguments *start* and *end* are interpreted as in the slice
   notation and are used to limit the search to a particular subsequence of
-   *x*.  The returned index is computed relative to the beginning of the full
+   the list.  The returned index is computed relative to the beginning of the full
   sequence rather than the *start* argument.



diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst
@@ -359,7 +359,7 @@ The built-in function :func:`len` returns the length of a string::
      Information about string formatting with :meth:`str.format`.

   :ref:`old-string-formatting`
-      The old formatting operations invoked when strings and Unicode strings are
+      The old formatting operations invoked when strings are
      the left operand of the ``%`` operator are described in more detail here.