fix ipython error in pythonrc (#289)

programs/python.json

@@ -3,7 +3,7 @@
         {
             "path": "$HOME/.python_history",
             "movable": true,
-            "help": "Export the following environment variables:\n\n```bash\nexport PYTHONSTARTUP=\"/etc/python/pythonrc\"\n```\n\nNow create the file _/etc/python/pythonrc_, and put the following code into it:\n\n```python\nimport os\nimport atexit\nimport readline\nfrom pathlib import Path\n\nif readline.get_current_history_length() == 0:\n\n    state_home = os.environ.get(\"XDG_STATE_HOME\")\n    if state_home is None:\n        state_home = Path.home() / \".local\" / \"state\"\n    else:\n        state_home = Path(state_home)\n\n    history_path = state_home / \"python_history\"\n    if history_path.is_dir():\n        raise OSError(f\"'{history_path}' cannot be a directory\")\n\n    history = str(history_path)\n\n    try:\n        readline.read_history_file(history)\n    except OSError: # Non existent\n        pass\n\n    def write_history():\n        try:\n            readline.write_history_file(history)\n        except OSError:\n            pass\n\n    atexit.register(write_history)\n```\n\n_Note: This won't work if python is invoked with -i flag._\n\n_Credit:_ https://unix.stackexchange.com/questions/630642/change-location-of-python-history"
+            "help": "Export the following environment variables:\n\n```bash\nexport PYTHONSTARTUP=\"$HOME\"/python/pythonrc\n```\n\nNow create the file _~/python/pythonrc_, and put the following code into it:\n\n```python\ndef is_vanilla() -> bool:\n    import sys\n    return not hasattr(__builtins__, '__IPYTHON__') and 'bpython' not in sys.argv[0]\n\n\ndef setup_history():\n    import os\n    import atexit\n    import readline\n    from pathlib import Path\n\n    if state_home := os.environ.get('XDG_STATE_HOME'):\n        state_home = Path(state_home)\n    else:\n        state_home = Path.home() / '.local' / 'state'\n\n    history: Path = state_home / 'python_history'\n\n    readline.read_history_file(str(history))\n    atexit.register(readline.write_history_file, str(history))\n\n\nif is_vanilla():\n    setup_history()\n```\n\nFinally, create an empty file at _$XDG_STATE_HOME/python_history_\n\n_Note: This won't work if python is invoked with -i flag._\n\n_Credit:_ https://github.com/b3nj5m1n/xdg-ninja/issues/289#issuecomment-1666024202"
         }
     ],
     "name": "python"