[issue37248] support conversion of `func(**{} if a else b)`

[Pablo Galindo Salgado]

New submission from Pablo Galindo Salgado <pablogsal at gmail.com>:

Please, can you add some text with an explanation ?

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nosy: +pablogsal

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37248>
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