feat(#201): remove empty lines and sparse decorations

[maxonfjvipon]

Ref: #201

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PR-Codex overview

Focus of this PR:

The focus of this PR is to make changes to various EO files related to collections such as list, range, multimap, map, and set.

Detailed summary:

• In list.eo, the index.eq zero condition has been modified.
• In hash-code-of.eo, the 0.as-bytes has been changed to zero-as-bytes.
• In range-tests.eo, some lines of code related to the range object have been modified.
• In range.eo, some lines of code related to the if. condition and append function have been modified.
• In multimap.eo and map.eo, the elements-amount has been changed to size.
• In multimap.eo, the size function and concat-all-arrays function have been removed.
• In map.eo, the size function has been removed and the with function has been modified.
• In set.eo, some lines of code related to the reduced. function and at. function have been modified.

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[maxonfjvipon]

@yegor256 please merge this one

[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 11min)