Issue #26778: Fixed "a/an/and" typos in code comment, documentation and error

messages.

Modules/_csv.c

@@ -731,7 +731,7 @@ parse_process_char(ReaderObj *self, Py_UCS4 c)
         break;
 
     case QUOTE_IN_QUOTED_FIELD:
-        /* doublequote - seen a quote in an quoted field */
+        /* doublequote - seen a quote in a quoted field */
         if (dialect->quoting != QUOTE_NONE &&
             c == dialect->quotechar) {
             /* save "" as " */

Modules/_ctypes/_ctypes.c

@@ -3802,7 +3802,7 @@ PyCFuncPtr_call(PyCFuncPtrObject *self, PyObject *inargs, PyObject *kwds)
             return NULL;
         }
         /* there should be more checks? No, in Python */
-        /* First arg is an pointer to an interface instance */
+        /* First arg is a pointer to an interface instance */
         if (!this->b_ptr || *(void **)this->b_ptr == NULL) {
             PyErr_SetString(PyExc_ValueError,
                             "NULL COM pointer access");

Modules/_io/stringio.c

@@ -438,7 +438,7 @@ stringio_iternext(stringio *self)
                                            _PyIO_str_readline, NULL);
         if (line && !PyUnicode_Check(line)) {
             PyErr_Format(PyExc_IOError,
-                         "readline() should have returned an str object, "
+                         "readline() should have returned a str object, "
                          "not '%.200s'", Py_TYPE(line)->tp_name);
             Py_DECREF(line);
             return NULL;

Modules/_io/textio.c

@@ -2689,7 +2689,7 @@ textiowrapper_iternext(textio *self)
                                            _PyIO_str_readline, NULL);
         if (line && !PyUnicode_Check(line)) {
             PyErr_Format(PyExc_IOError,
-                         "readline() should have returned an str object, "
+                         "readline() should have returned a str object, "
                          "not '%.200s'", Py_TYPE(line)->tp_name);
             Py_DECREF(line);
             return NULL;

Modules/_pickle.c

@@ -4465,7 +4465,7 @@ Pickler_set_memo(PicklerObject *self, PyObject *obj)
     }
     else {
         PyErr_Format(PyExc_TypeError,
-                     "'memo' attribute must be an PicklerMemoProxy object"
+                     "'memo' attribute must be a PicklerMemoProxy object"
                      "or dict, not %.200s", Py_TYPE(obj)->tp_name);
         return -1;
     }
@@ -4703,7 +4703,7 @@ calc_binsize(char *bytes, int nbytes)
 
 /* s contains x bytes of a little-endian integer.  Return its value as a
  * C int.  Obscure:  when x is 1 or 2, this is an unsigned little-endian
- * int, but when x is 4 it's a signed one.  This is an historical source
+ * int, but when x is 4 it's a signed one.  This is a historical source
  * of x-platform bugs.
  */
 static long

Modules/_tracemalloc.c

@@ -719,7 +719,7 @@ tracemalloc_realloc(void *ctx, void *ptr, size_t new_size)
                the caller, because realloc() may already have shrinked the
                memory block and so removed bytes.
 
-               This case is very unlikely: an hash entry has just been
+               This case is very unlikely: a hash entry has just been
                released, so the hash table should have at least one free entry.
 
                The GIL and the table lock ensures that only one thread is

Modules/faulthandler.c

@@ -1178,7 +1178,7 @@ static PyMethodDef module_methods[] = {
     {"register",
      (PyCFunction)faulthandler_register_py, METH_VARARGS|METH_KEYWORDS,
      PyDoc_STR("register(signum, file=sys.stderr, all_threads=True, chain=False): "
-               "register an handler for the signal 'signum': dump the "
+               "register a handler for the signal 'signum': dump the "
                "traceback of the current thread, or of all threads if "
                "all_threads is True, into file")},
     {"unregister",

Modules/itertoolsmodule.c

@@ -4484,7 +4484,7 @@ static PyMethodDef zip_longest_methods[] = {
 PyDoc_STRVAR(zip_longest_doc,
 "zip_longest(iter1 [,iter2 [...]], [fillvalue=None]) --> zip_longest object\n\
 \n\
-Return an zip_longest object whose .__next__() method returns a tuple where\n\
+Return a zip_longest object whose .__next__() method returns a tuple where\n\
 the i-th element comes from the i-th iterable argument.  The .__next__()\n\
 method continues until the longest iterable in the argument sequence\n\
 is exhausted and then it raises StopIteration.  When the shorter iterables\n\

Modules/selectmodule.c

@@ -2127,7 +2127,7 @@ kqueue_queue_control(kqueue_queue_Object *self, PyObject *args)
         if (_PyTime_FromSecondsObject(&timeout,
                                       otimeout, _PyTime_ROUND_CEILING) < 0) {
             PyErr_Format(PyExc_TypeError,
-                "timeout argument must be an number "
+                "timeout argument must be a number "
                 "or None, got %.200s",
                 Py_TYPE(otimeout)->tp_name);
             return NULL;