Make Py3k warnings consistent w.r.t. punctuation; also respect the
EOL 80 limit and supply more alternatives in warning messages.
diff --git a/Objects/cellobject.c b/Objects/cellobject.c
index 2286aaf..b86739e 100644
--- a/Objects/cellobject.c
+++ b/Objects/cellobject.c
@@ -55,8 +55,9 @@
 cell_compare(PyCellObject *a, PyCellObject *b)
 {
 	/* Py3K warning for comparisons  */
-	if (Py_Py3kWarningFlag && PyErr_Warn(PyExc_DeprecationWarning,
-			"cell comparisons not supported in 3.x.") < 0) {
+	if (Py_Py3kWarningFlag &&
+            PyErr_Warn(PyExc_DeprecationWarning,
+		       "cell comparisons not supported in 3.x") < 0) {
 		return -2;
 	}