Map::eq() is not working as expected

See #15, release log:

• 7eb7021 by @yegor256: #7 tarpaulin 0.25.2
• 6cece2d by @yegor256: #7 src/
• eccead5 by @yegor256: #7 exclude files from coverage
• dfde22f by @Zefick: clippy errors
• 666f656 by @Zefick: impl FromIterator and From for...
• 79abf4e by @yegor256: #7 more inline
• 21b9740 by @yegor256: #7 doc
• 1f48f83 by @yegor256: #7 doc
• 5a8370a by @yegor256: #7 doc
• aa791c7 by @yegor256: #7 doc
• 632b282 by @yegor256: #7 more doc
• 4606bf2 by @yegor256: #7 typo
• 6e13ad0 by @yegor256: #7 doc
• bf1ffd6 by @yegor256: #7 typo
• 3cad983 by @yegor256: #17 doc
• 702dd44 by @yegor256: #17 eq.rs
• a9366d2 by @yegor256: #7 panic
• 986ae72 by @Zefick: Merge branch 'master' into 14
• e9520fe by @Zefick: tests for Index
• 23d81bb by @WiebeCnossen: #21 Optimize loops by exploiti...
• and 8 more...

Released by Rultor 1.74.7, see build log