My copy is at home, as is my co-worker's copy. Hopefully I'm not saying something fundamentally stupid here.
Perhaps the solution to this entire muddle is to have as the first line of commentary after that best practice read:
Allowing the same name ensures your program will operate correctly when users, inevitably, do specify the same filename. Be Prepared, as the teach Boy Scouts 1.
1 If you have trouble remembering the Scout's famous motto, seek out the Tom Lehrer recording and have that song play through your head while coding.
Be Appropriate && Follow Your Curiosity
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