non-late-night regex fixing.

Author: gpshead

Lib/test/test_subprocess.py

@@ -3398,7 +3398,7 @@ def test_vfork_used_when_expected(self):
                     _run_using_command=strace_command,
             )
             # Match both vfork() and clone(..., flags=...|CLONE_VFORK|...)
-            self.assertRegex(vfork_result.err, br"(?mi)^vfork")
+            self.assertRegex(vfork_result.err, br"(?mi)vfork")
             # Do NOT check that fork() or other clones did not happen.
             # If the OS denys the vfork it'll fallback to plain fork().
 
@@ -3426,7 +3426,7 @@ def test_vfork_used_when_expected(self):
                     _run_using_command=strace_command,
                 )
                 # Ensure neither vfork() or clone(..., flags=...|CLONE_VFORK|...).
-                self.assertNotRegex(non_vfork_result.err, br"(?mi)^vfork")
+                self.assertNotRegex(non_vfork_result.err, br"(?mi)vfork")
 
 
 @unittest.skipUnless(mswindows, "Windows specific tests")