ci: use some tricks to format macro bodies #2175

Job	Run time
Build Channels Windows (1.63.0)	10s
Build Channels Linux (stable)	5s
Build Channels Windows (stable)	9s
Build Channels Linux (beta)	11s
Build Channels Linux (nightly)	11s
macOS (aarch64-apple-darwin)	21s
Build Channels Linux (1.63.0)	1m 45s
Style check	12s
Check #[cfg]s	13s
Docker Linux Tier1 (i686-unknown-linux-gnu)	31s
Docker Linux Tier1 (x86_64-unknown-linux-gnu)	39s
Solaris (x86_64-pc-solaris)	3m 22s
Windows (x86_64-pc-windows-gnu, 64, x86_64)	3m 35s
Windows (x86_64-pc-windows-msvc)	3m 44s
Windows (i686-pc-windows-msvc)	3m 52s
Build Channels macOS	0s
Docker Linux Tier2	0s
success	1s
	19m 1s

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