use floor division and add a test that exercises the tabsize codepath
diff --git a/Lib/test/test_tokenize.py b/Lib/test/test_tokenize.py
index ae5f410..e5371cf 100644
--- a/Lib/test/test_tokenize.py
+++ b/Lib/test/test_tokenize.py
@@ -508,6 +508,23 @@
... break
... else: True
True
+
+Evil tabs
+ >>> dump_tokens("def f():\\n\\tif x\\n \tpass")
+ NAME 'def' (1, 0) (1, 3)
+ NAME 'f' (1, 4) (1, 5)
+ OP '(' (1, 5) (1, 6)
+ OP ')' (1, 6) (1, 7)
+ OP ':' (1, 7) (1, 8)
+ NEWLINE '\\n' (1, 8) (1, 9)
+ INDENT '\\t' (2, 0) (2, 1)
+ NAME 'if' (2, 1) (2, 3)
+ NAME 'x' (2, 4) (2, 5)
+ NEWLINE '\\n' (2, 5) (2, 6)
+ INDENT ' ' (3, 0) (3, 9)
+ NAME 'pass' (3, 9) (3, 13)
+ DEDENT '' (4, 0) (4, 0)
+ DEDENT '' (4, 0) (4, 0)
"""