slicing is not cleaning up edges

See #108, release log:

• 8e56737 by @yegor256: #108 Alert up
• 610da9e by @yegor256: #108 Scipt moved up
• aa346c3 by @yegor256: #108 typos
• 0514abb by @yegor256: #108 clippy clean
• 7d16719 by @yegor256: clean
• 2b7c9ac by @yegor256: polish
• 5f39ab7 by @yegor256: polish
• f5ab1ef by @yegor256: polish
• 6c91fa8 by @yegor256: polish
• 119cbd9 by @yegor256: polish
• 1b40d40 by @yegor256: #108 nocolor
• e076dbc by @yegor256: #108 nodeps for clippy
• 091689b by @yegor256: #108 slice_some fixed
• caf34da by @yegor256: typo
• f24b268 by @yegor256: better logging
• 9a5bcb3 by @yegor256: better error reporting
• e4f9108 by @rultor: Merge branch '__rultor'
• 3abb5f0 by @renovate[bot]: Update Rust crate serde to 1.0...
• 20639c9 by @renovate[bot]: Update Rust crate anyhow to 1....

Released by Rultor 2.0-SNAPSHOT, see build log