Fix Layout/ElseAlignment for rescue/else/ensure inside do/end blocks with assignment.

[miry]

Fix the problem of broken indent of else iniside block with rescue:

# bad
var = array.map do |i|
  code
rescue
  code
      else
        code
end

# good
var = array.map do |i|
  code
rescue
  code
else
  code
end

---

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• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
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• Squashed related commits together.
• Added tests.
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[miry]

@koic Let me know if you need something from my side to test this PR.

[koic]

@miry Thank you for fixing! I commented a little feedback, anyway overall it looks good to me.

[koic]

Looks good to me. Can you squash your commits into one?

[miry]

@koic done

[bbatsov]

Thanks!