#18466: fix more typos. Patch by Févry Thibault.

Include/datetime.h

@@ -42,7 +42,7 @@ typedef struct
 
 typedef struct
 {
-    PyObject_HEAD               /* a pure abstract base clase */
+    PyObject_HEAD               /* a pure abstract base class */
 } PyDateTime_TZInfo;
 
 

Lib/collections/__init__.py

@@ -375,7 +375,7 @@ def namedtuple(typename, field_names, verbose=False, rename=False):
         print(result._source)
 
     # For pickling to work, the __module__ variable needs to be set to the frame
-    # where the named tuple is created.  Bypass this step in enviroments where
+    # where the named tuple is created.  Bypass this step in environments where
     # sys._getframe is not defined (Jython for example) or sys._getframe is not
     # defined for arguments greater than 0 (IronPython).
     try:

Lib/test/datetimetester.py

@@ -250,7 +250,7 @@ class TestTimeZone(unittest.TestCase):
                              t.replace(tzinfo=tz).dst())
 
 #############################################################################
-# Base clase for testing a particular aspect of timedelta, time, date and
+# Base class for testing a particular aspect of timedelta, time, date and
 # datetime comparisons.
 
 class HarmlessMixedComparison:

Lib/test/test_urllib.py

@@ -1218,7 +1218,7 @@ class URLopener_Tests(unittest.TestCase):
 # Everywhere else they work ok, but on those machines, sometimes
 # fail in one of the tests, sometimes in other. I have a linux, and
 # the tests go ok.
-# If anybody has one of the problematic enviroments, please help!
+# If anybody has one of the problematic environments, please help!
 # .   Facundo
 #
 # def server(evt):

Modules/_winapi.c

@@ -489,7 +489,7 @@ getenvironment(PyObject* environment)
     Py_UCS4 *buffer = NULL, *p, *end;
     PyObject *keys, *values, *res;
 
-    /* convert environment dictionary to windows enviroment string */
+    /* convert environment dictionary to windows environment string */
     if (! PyMapping_Check(environment)) {
         PyErr_SetString(
             PyExc_TypeError, "environment must be dictionary or None");