test_faulthandler: fix regex on the check_dump_traceback_threads() traceback
The traceback may contain "_is_owned":
Thread 0x40962b90:
File "/srv/buildbot/buildarea/3.x.bolen-ubuntu/build/Lib/threading.py", line 220 in _is_owned
File "/srv/buildbot/buildarea/3.x.bolen-ubuntu/build/Lib/threading.py", line 227 in wait
File "/srv/buildbot/buildarea/3.x.bolen-ubuntu/build/Lib/threading.py", line 421 in wait
File "<string>", line 23 in run
File "/srv/buildbot/buildarea/3.x.bolen-ubuntu/build/Lib/threading.py", line 735 in _bootstrap_inner
File "/srv/buildbot/buildarea/3.x.bolen-ubuntu/build/Lib/threading.py", line 708 in _bootstrap
Current thread XXX:
File "<string>", line 10 in dump
File "<string>", line 28 in <module>
diff --git a/Lib/test/test_faulthandler.py b/Lib/test/test_faulthandler.py
index a919900..2730aff 100644
--- a/Lib/test/test_faulthandler.py
+++ b/Lib/test/test_faulthandler.py
@@ -325,9 +325,8 @@
lineno = 10
regex = """
^Thread 0x[0-9a-f]+:
-(?: File ".*threading.py", line [0-9]+ in wait
-)? File ".*threading.py", line [0-9]+ in wait
- File "<string>", line 23 in run
+(?: File ".*threading.py", line [0-9]+ in [_a-z]+
+){{1,3}} File "<string>", line 23 in run
File ".*threading.py", line [0-9]+ in _bootstrap_inner
File ".*threading.py", line [0-9]+ in _bootstrap