[3.12] Add some doctest cleanups for configparser (GH-125288) (#125291)

Co-authored-by: Alex Waygood <[email protected]>
Co-authored-by: Adam Turner <[email protected]>

Author: 3 people

Doc/library/configparser.rst

@@ -54,6 +54,7 @@ can be customized by end users easily.
 
    import os
    os.remove("example.ini")
+   os.remove("override.ini")
 
 
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