Improve diffs inside Elixir sigils #3287

Job	Run time
Output Regression Test	4m 30s
Test Linux (latest stable Rust)	2m 16s
Test with MIME database	4m 7s
Test x86_64-unknown-linux-gnu	4m 19s
Test x86_64-apple-darwin	1s
Actionlint	59s
Rustfmt	1m 25s
Check Linux Packaging	4m 3s
Test x86_64-pc-windows-msvc	4m 55s
Test aarch64-unknown-linux-gnu	5m 48s
Test aarch64-apple-darwin	5m 21s
Test x86_64-unknown-linux-musl	4m 42s
	42m 26s

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