Optimize editing multi-line text #13892

Job	Run time
Check wasm32 + wasm-bindgen	2m 23s
Check wasm32+atomics	1m 42s
Format + check + test	2m 27s
android	28s
cargo-deny aarch64-apple-darwin	40s
cargo-deny aarch64-linux-android	38s
cargo-deny i686-pc-windows-gnu	41s
cargo-deny i686-pc-windows-msvc	44s
cargo-deny i686-unknown-linux-gnu	41s
ios	26s
cargo-deny wasm32-unknown-unknown	38s
cargo-deny x86_64-apple-darwin	40s
Run tests	1m 48s
cargo-deny x86_64-pc-windows-gnu	37s
cargo-deny x86_64-pc-windows-msvc	41s
cargo-deny x86_64-unknown-linux-gnu	40s
Check Windows	1m 52s
cargo-deny x86_64-unknown-linux-musl	43s
cargo-deny x86_64-unknown-redox	41s
	19m 10s

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