Perform inline choice conversion to string in macro (#322) #1197

Job	Run time
Build docs	1m 48s
Clippy	1m 1s
Rustfmt	13s
Test (MSRV)	1m 23s
Test (stable)	2m 14s
Test (beta)	2m 0s
Test (nightly)	1m 45s
Test (macOS)	1m 28s
Test (Windows)	7m 26s
Test (no features)	1m 12s
Test (all features - simdjson, cargo test --all-features --lib --tests --examples)	1m 14s
Test (native TLS, cargo test --all-features --features serenity/native_tls_backend --lib --tests ...	1m 32s
	23m 16s

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