Doc: fix import of asdl.py when called from outside Doc/. (GH-21529)

diff --git a/Doc/tools/extensions/asdl_highlight.py b/Doc/tools/extensions/asdl_highlight.py
index 7d2ef011c1b76678b4eb82d665f96c712089e357..b1989e53957072fc9fec4ba92731729f567839e6 100644 (file)
--- a/Doc/tools/extensions/asdl_highlight.py
+++ b/Doc/tools/extensions/asdl_highlight.py
@@ -1,6 +1,9 @@
 import os
 import sys
-sys.path.append(os.path.abspath("../Parser/"))
+from pathlib import Path
+
+CPYTHON_ROOT = Path(__file__).resolve().parent.parent.parent.parent
+sys.path.append(str(CPYTHON_ROOT / "Parser"))
 
 from pygments.lexer import RegexLexer, bygroups, include, words
 from pygments.token import (Comment, Generic, Keyword, Name, Operator,