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I am dumb and can't spell (#1366)

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* rename implementor's guide to implementer's guide

* fix typos in more places
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Robert Habermeier
2020-07-07 10:10:36 -04:00
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polkadot/roadmap/implementers-guide/src/node/backing/README.md
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# Backing Subsystems
The backing subsystems, when conceived as a black box, receive an arbitrary quantity of parablock candidates and associated proofs of validity from arbitrary untrusted collators. From these, they produce a bounded quantity of backable candidates which relay chain block authors may choose to include in a subsequent block.
In broad strokes, the flow operates like this:
- **Candidate Selection** winnows the field of parablock candidates, selecting up to one of them to second.
- **Candidate Backing** ensures that a seconding candidate is valid, then generates the appropriate `Statement`. It also keeps track of which candidates have received the backing of a quorum of other validators.
- **Statement Distribution** is the networking component which ensures that all validators receive each others' statements.
- **PoV Distribution** is the networking component which ensures that validators considering a candidate can get the appropriate PoV.