classifyws():  Fix a "/" to work under -Qnew (as well as without it).
Bugfix candidate!
diff --git a/Tools/idle/AutoIndent.py b/Tools/idle/AutoIndent.py
index 66a0aec..87f75c1 100644
--- a/Tools/idle/AutoIndent.py
+++ b/Tools/idle/AutoIndent.py
@@ -495,7 +495,7 @@
             effective = effective + 1
         elif ch == '\t':
             raw = raw + 1
-            effective = (effective / tabwidth + 1) * tabwidth
+            effective = (int(effective / tabwidth) + 1) * tabwidth
         else:
             break
     return raw, effective