Small notebook fixes

[iKintosh]

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• Did you read the contribution guide?
• Did you update the docs? We use Numpy format for all the methods and classes.
• Did you write any new necessary tests?
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Type of Change

• Examples / docs / tutorials / contributors update
• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves an existing feature)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Proposed Changes

Related Issue

Closing issues

[codecov-commenter]

Codecov Report

Merging #595 (3264877) into master (ef6c8e6) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #595   +/-   ##
=======================================
  Coverage   85.72%   85.72%           
=======================================
  Files         117      117           
  Lines        5759     5759           
=======================================
  Hits         4937     4937           
  Misses        822      822           

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[martins0n]

Ensemble notebook has strange order of cells. We should rerun it once again