Use the preferred form of raise statements in the docs.
diff --git a/Doc/library/shutil.rst b/Doc/library/shutil.rst
index e09b646..ad3ab57 100644
--- a/Doc/library/shutil.rst
+++ b/Doc/library/shutil.rst
@@ -216,7 +216,7 @@
        except OSError, why:
            errors.extend((src, dst, str(why)))
        if errors:
-           raise Error, errors
+           raise Error(errors)
 
 Another example that uses the :func:`ignore_patterns` helper::