Issue #28820: Merge typo fixes from 3.6

Doc/howto/urllib2.rst

@@ -578,7 +578,7 @@ Footnotes
 This document was reviewed and revised by John Lee.
 
 .. [#] Google for example.
-.. [#] Browser sniffing is a very bad practise for website design - building
+.. [#] Browser sniffing is a very bad practice for website design - building
        sites using web standards is much more sensible. Unfortunately a lot of
        sites still send different versions to different browsers.
 .. [#] The user agent for MSIE 6 is

Doc/tutorial/modules.rst

@@ -501,7 +501,7 @@ when the ``from...import`` statement is executed.  (This also works when
 ``__all__`` is defined.)
 
 Although certain modules are designed to export only names that follow certain
-patterns when you use ``import *``, it is still considered bad practise in
+patterns when you use ``import *``, it is still considered bad practice in
 production code.
 
 Remember, there is nothing wrong with using ``from Package import

Objects/abstract.c

@@ -2331,7 +2331,7 @@ _PyObject_FastCallDict(PyObject *callable, PyObject **args, Py_ssize_t nargs,
     return result;
 }
 
-/* Positional arguments are obj followed args:
+/* Positional arguments are obj followed by args:
    call callable(obj, *args, **kwargs) */
 PyObject *
 _PyObject_Call_Prepend(PyObject *callable,