Resolve "Write a spec for endorsements" - [merged]

[massa-bot]

In GitLab by @AureliaDolo

Merges 155-write-a-spec-for-endorsements -> dev

Closes #155

[massa-bot]

In GitLab by @AureliaDolo

assigned to @adolo

[massa-bot]

In GitLab by @AureliaDolo

added 2 commits

• 72e622e6 - Added endorsment doc.
• 3b924ac2 - Added example in endorsement doc.

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[massa-bot]

In GitLab by @AureliaDolo

added 1 commit

• 413c1322 - Added doc and comments for endorsements.

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[massa-bot]

In GitLab by @damip

marked this merge request as ready

[massa-bot]

In GitLab by @damip

approved this merge request

[massa-bot]

In GitLab by @damip

mentioned in commit 3eea6eb85bf2ddb913d4134fd5971570657eda17