future-proof: remove write! from the public API
#83
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instead only `#[derive(Format)]` is to be used to implement the `Format` trait
Co-authored-by: Jonas Schievink <jonas.schievink@ferrous-systems.com>
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instead only
#[derive(Format)]is to be used to implement theFormattraitrationale is in #82
also we didn't spec the
enumformat in the user guide part of the book so users would had not been able to implement Format for enums usingwrite!