Spelling fixes supplied by Rob W. W. Hooft. All these are fixes in either

comments, docstrings or error messages. I fixed two minor things in
test_winreg.py ("didn't" -> "Didn't" and "Didnt" -> "Didn't").

There is a minor style issue involved: Guido seems to have preferred English
grammar (behaviour, honour) in a couple places. This patch changes that to
American, which is the more prominent style in the source. I prefer English
myself, so if English is preferred, I'd be happy to supply a patch myself ;)

Objects/classobject.c

@@ -1077,7 +1077,7 @@ static int instance_contains(PyInstanceObject *inst, PyObject *member)
 	}
 	func = instance_getattr(inst, __contains__);
 	if(func == NULL) {
-		/* fall back to previous behaviour */
+		/* fall back to previous behavior */
 		int i, cmp_res;
 
 		if(!PyErr_ExceptionMatches(PyExc_AttributeError))
@@ -1160,7 +1160,7 @@ PyInstance_DoBinOp(PyObject *v, PyObject *w, char *opname, char *ropname,
 		return result;
 	if (halfbinop(w, v, ropname, &result, thisfunc, 1) <= 0)
 		return result;
-	/* Sigh -- special case for comnparisons */
+	/* Sigh -- special case for comparisons */
 	if (strcmp(opname, "__cmp__") == 0) {
 		long c = (v < w) ? -1 : (v > w) ? 1 : 0;
 		return PyInt_FromLong(c);

Objects/dictobject.c

@@ -185,7 +185,7 @@ lookdict(dictobject *mp, PyObject *key, register long hash)
 		/* Cycle through GF(2^n)-{0} */
 		incr = incr << 1;
 		if (incr > mask)
-			incr ^= mp->ma_poly; /* This will implicitely clear
+			incr ^= mp->ma_poly; /* This will implicitly clear
 						the highest bit */
 	}
 }

Objects/intobject.c

@@ -311,7 +311,7 @@ int_sub(PyIntObject *v, PyIntObject *w)
 /*
 Integer overflow checking used to be done using a double, but on 64
 bit machines (where both long and double are 64 bit) this fails
-because the double doesn't have enouvg precision.  John Tromp suggests
+because the double doesn't have enough precision.  John Tromp suggests
 the following algorithm:
 
 Suppose again we normalize a and b to be nonnegative.

Objects/object.c

@@ -337,7 +337,7 @@ do_cmp(PyObject *v, PyObject *w)
 
 PyObject *_PyCompareState_Key;
 
-/* _PyCompareState_nesting is incremented beforing call compare (for
+/* _PyCompareState_nesting is incremented before calling compare (for
    some types) and decremented on exit.  If the count exceeds the
    nesting limit, enable code to detect circular data structures.
 */

Objects/stringobject.c

@@ -283,7 +283,7 @@ string_print(PyStringObject *op, FILE *fp, int flags)
 		return 0;
 	}
 
-	/* figure out which quote to use; single is prefered */
+	/* figure out which quote to use; single is preferred */
 	quote = '\'';
 	if (strchr(op->ob_sval, '\'') && !strchr(op->ob_sval, '"'))
 		quote = '"';
@@ -321,7 +321,7 @@ string_repr(register PyStringObject *op)
 		register char *p;
 		int quote;
 
-		/* figure out which quote to use; single is prefered */
+		/* figure out which quote to use; single is preferred */
 		quote = '\'';
 		if (strchr(op->ob_sval, '\'') && !strchr(op->ob_sval, '"'))
 			quote = '"';
@@ -1416,10 +1416,10 @@ mymemcnt(const char *mem, int len, const char *pat, int pat_len)
 /*
    mymemreplace
 
-   Return a string in which all occurences of PAT in memory STR are
+   Return a string in which all occurrences of PAT in memory STR are
    replaced with SUB.
 
-   If length of PAT is less than length of STR or there are no occurences
+   If length of PAT is less than length of STR or there are no occurrences
    of PAT in STR, then the original string is returned. Otherwise, a new
    string is allocated here and returned.
 
@@ -1689,7 +1689,7 @@ string_expandtabs(PyStringObject *self, PyObject *args)
     if (!PyArg_ParseTuple(args, "|i:expandtabs", &tabsize))
 	return NULL;
 
-    /* First pass: determine size of ouput string */
+    /* First pass: determine size of output string */
     i = j = 0;
     e = PyString_AS_STRING(self) + PyString_GET_SIZE(self);
     for (p = PyString_AS_STRING(self); p < e; p++)

Objects/unicodeobject.c

@@ -3198,7 +3198,7 @@ int PyUnicode_Compare(PyObject *left,
     if (v == NULL)
 	goto onError;
 
-    /* Shortcut for emtpy or interned objects */
+    /* Shortcut for empty or interned objects */
     if (v == u) {
 	Py_DECREF(u);
 	Py_DECREF(v);
@@ -3385,7 +3385,7 @@ unicode_expandtabs(PyUnicodeObject *self, PyObject *args)
     if (!PyArg_ParseTuple(args, "|i:expandtabs", &tabsize))
 	return NULL;
 
-    /* First pass: determine size of ouput string */
+    /* First pass: determine size of output string */
     i = j = 0;
     e = self->str + self->length;
     for (p = self->str; p < e; p++)