doc: improve _Deprecation_ definition (!20788) · Merge requests · Rodrigo Test / Test Group-nodejs / node · GitLab

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Rodrigo Muino Tomonari requested to merge github/fork/Trott/deprecation-definition into master May 16, 2018

Use definition from Wikipedia. Provide link.
Use italics for "words-as-words".
Simplify sentence. ("Deprecation is..." rather than "Deprecation refers to...".)

Checklist

documentation is changed or added
commit message follows commit guidelines