text: Title: Inline environment variable: `ValueError: identifier field can't represent`
  Body: ```xsh
  $QWE=False echo 1
  ```
  ```xsh
  Traceback (most recent call last):
    File "/opt/homebrew/lib/python3.11/site-packages/xonsh/ptk_shell/shell.py", line 389, in _push
      code = self.execer.compile(
             ^^^^^^^^^^^^^^^^^^^^
  ValueError: identifier field can't represent 'False' constant
  ```
  
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