apk-inspect: Pass error by reference to format_error_message() #39

Job	Run time
Run linters	35s
Test on x86_64-alpine-linux-musl (dynamically linked)	54s
Test with --features base64	40s
Test with --features shell-timeout	37s
Test with --features flate2-zlib --no-default-features	31s
Test with --features flate2-zlib-ng --no-default-features	46s
Test on x86_64-unknown-linux-musl with Rust stable	54s
Test on x86_64-unknown-linux-musl with Rust nightly	1m 9s
Test on x86_64-unknown-linux-musl with Rust 1.64	2m 22s
Test on x86_64-unknown-linux-gnu with Rust stable	1m 1s
Test on x86_64-apple-darwin with Rust stable	1m 31s
Test on aarch64-unknown-linux-musl with Rust stable	2m 26s
Test on aarch64-unknown-linux-gnu with Rust stable	2m 11s
Test on armv7-unknown-linux-musleabihf with Rust stable	2m 49s
Test on powerpc64le-unknown-linux-gnu with Rust stable	2m 32s
Test on riscv64gc-unknown-linux-gnu with Rust stable	3m 3s
	24m 1s

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