13403: Disable assertion rewriting for external modules

Author: Tusenka

src/_pytest/assertion/rewrite.py

@@ -216,6 +216,10 @@ def _early_rewrite_bailout(self, name: str, state: AssertionState) -> bool:
             if fnmatch_ex(pat, path):
                 return False
 
+        rootPath=os.getcwd()
+        if not path.is_relative_to(rootPath):
+            return True
+
         if self._is_marked_for_rewrite(name, state):
             return False