b6121edf70a8d50fd16ddbba0c3168e5e49bfc2e swapped "is" for "==" in literal comparison (Tyler Chambers) Pull request description: In Python 3.8+ literal comparisons using "is" instead of "==" produce a SyntaxWarning [source](https://docs.python.org/3.8/whatsnew/3.8.html#changes-in-python-behavior). I checked the entire devtools directory, this seems to be the only occurrence. This is a small fix, but removes the SyntaxWarning. Fixes: #20338 ACKs for top commit: hebasto: re-ACK b6121edf70a8d50fd16ddbba0c3168e5e49bfc2e, only squashed since my [previous](https://github.com/bitcoin/bitcoin/pull/20346#pullrequestreview-525934568) review. practicalswift: re-ACK b6121edf70a8d50fd16ddbba0c3168e5e49bfc2e: patch still looks correct theStack: utACK b6121edf70a8d50fd16ddbba0c3168e5e49bfc2e Tree-SHA512: 82a43495d6552fbaa3b02b58f0930b049d27aa937fe44b47714e3c059f844cc494de20674557371cbccf24fb8873ecb7376fb965ae326847eed2b855ed2d59c6
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