[kvm-unit-tests PATCH] scripts/pretty_print_stacks.py: Silence warning from Python 3.12

[Thomas Huth <thuth@xxxxxxxxxx>]

Python 3.12 complains:

 ./scripts/pretty_print_stacks.py:41: SyntaxWarning:
  invalid escape sequence '\?'
  m = re.match(b'(.*) at (.*):(([0-9]+)|\?)([^:]*)', line)

Switch to a raw string to silence the problem.

Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>
---
 scripts/pretty_print_stacks.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/pretty_print_stacks.py b/scripts/pretty_print_stacks.py
index d990d300..5bce84fc 100755
--- a/scripts/pretty_print_stacks.py
+++ b/scripts/pretty_print_stacks.py
@@ -38,7 +38,7 @@ def pretty_print_stack(binary, line):
         return
 
     for line in out.splitlines():
-        m = re.match(b'(.*) at (.*):(([0-9]+)|\?)([^:]*)', line)
+        m = re.match(r'(.*) at (.*):(([0-9]+)|\?)([^:]*)', line)
         if m is None:
             puts('%s\n' % line)
             return
-- 
2.43.0