@@ -401,7 +401,7 @@ library that are impossible to free (e.g. a tool like Purify will complain about
 these).  Python is, however, aggressive about cleaning up memory on exit and
 does try to destroy every single object.
 
-If you want to force Python to delete certain things on deallocation use the
+If you want to force Python to delete certain things when Python exits, use the
 :mod:`atexit` module to run a function that will force those deletions.
 
 
 
@@ -209,25 +209,20 @@ minor that it doesn't seem worth the effort.)
 How do I debug an extension?
 ----------------------------
 
-When using GDB with dynamically loaded extensions, you can't set a breakpoint in
-your extension until your extension is loaded.
-
-In your ``.gdbinit`` file (or interactively), add the command:
-
-.. code-block:: none
-
-   br _PyImport_LoadDynamicModule
-
-Then, when you run GDB:
+When using GDB with dynamically loaded extensions, enable pending breakpoints
+to set a breakpoint before the extension is loaded.  For example, to stop in
+a function named ``myfunction``:
 
 .. code-block:: shell-session
 
    $ gdb /local/bin/python
-   gdb) run myscript.py
-   gdb) continue # repeat until your extension is loaded
-   gdb) finish   # so that your extension is loaded
-   gdb) br myfunction.c:50
-   gdb) continue
+   (gdb) set breakpoint pending on
+   (gdb) break myfunction
+   (gdb) run myscript.py
+
+GDB resolves the breakpoint when the extension is loaded and stops when the
+function is called.  You can also set a pending breakpoint directly in your
+extension's source code, for example with ``break myfunction.c:50``.
 
 I want to compile a Python module on my Linux system, but some files are missing. Why?
 --------------------------------------------------------------------------------------
 
@@ -1198,8 +1198,7 @@ Use the :func:`reversed` built-in function::
    for x in reversed(sequence):
        ...  # do something with x ...
 
-This won't touch your original sequence, but build a new copy with reversed
-order to iterate over.
+This returns a reverse iterator without modifying your original sequence.
 
 
 How do you remove duplicates from a list?
@@ -1642,8 +1641,8 @@ Use the built-in :func:`super` function::
 
 In the example, :func:`super` will automatically determine the instance from
 which it was called (the ``self`` value), look up the :term:`method resolution
-order` (MRO) with ``type(self).__mro__``, and return the next in line after
-``Derived`` in the MRO: ``Base``.
+order` (MRO) with ``type(self).__mro__``, and return a proxy that searches for
+methods starting with the next class after ``Derived`` in the MRO: ``Base``.
 
 
 How can I organize my code to make it easier to change the base class?
@@ -1686,7 +1685,7 @@ C)`` holds, unless overridden by ``c`` itself or by some class on the base-class
 search path from ``c.__class__`` back to ``C``.
 
 Caution: within a method of C, an assignment like ``self.count = 42`` creates a
-new and unrelated instance named "count" in ``self``'s own dict.  Rebinding of a
+new and unrelated attribute named "count" in ``self``'s own dict.  Rebinding of a
 class-static data name must always specify the class whether inside a method or
 not::
 
@@ -2055,30 +2054,6 @@ relevant instance attributes are mutable, the ``cached_property`` approach
 can't be made to work because it cannot detect changes to the
 attributes.
 
-To make the ``lru_cache`` approach work when the *station_id* is mutable,
-the class needs to define the :meth:`~object.__eq__` and :meth:`~object.__hash__`
-methods so that the cache can detect relevant attribute updates::
-
-    class Weather:
-        "Example with a mutable station identifier"
-
-        def __init__(self, station_id):
-            self.station_id = station_id
-
-        def change_station(self, station_id):
-            self.station_id = station_id
-
-        def __eq__(self, other):
-            return self.station_id == other.station_id
-
-        def __hash__(self):
-            return hash(self.station_id)
-
-        @lru_cache(maxsize=20)
-        def historic_rainfall(self, date, units='cm'):
-            'Rainfall on a given date'
-            # Depends on the station_id, date, and units.
-
 
 Modules
 =======