tests: filter out PEP 657 error locations in tracebacks (issue6780)

https://docs.python.org/3/whatsnew/3.11.html#whatsnew311-pep657

tests/filtertraceback.py

@@ -1,39 +1,44
 #!/usr/bin/env python3
 
 # Filters traceback lines from stdin.
 
 
 import io
 import sys
 
 if sys.version_info[0] >= 3:
     # Prevent \r from being inserted on Windows.
     sys.stdout = io.TextIOWrapper(
         sys.stdout.buffer,
         sys.stdout.encoding,
         sys.stdout.errors,
         newline="\n",
         line_buffering=sys.stdout.line_buffering,
     )
 
 state = 'none'
 
 for line in sys.stdin:
     if state == 'none':
         if line.startswith('Traceback '):
             state = 'tb'
 
     elif state == 'tb':
         if line.startswith('  File '):
             state = 'file'
             continue
 
         elif not line.startswith(' '):
             state = 'none'
 
+        elif not line.replace('^', '').replace('~', '').strip():
+            # PEP 657: Fine-grained error locations in tracebacks
+            #                       ~~~~~~^^^^^^^^^
+            continue
+
     elif state == 'file':
         # Ignore lines after "  File "
         state = 'tb'
         continue
 
     print(line, end='')