Pub command to create or edit a pubspec

[DartBot]

<img src="https://avatars.githubusercontent.com/u/444270?v=3" align="left" width="96" height="96"hspace="10"> Issue by seaneagan
Originally opened as dart-lang/sdk#20997

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Just like npm init. Could be pub init, or maybe something which portrays that you can use it on an existing pubspec like pub spec. Might be nice to be able to pass arguments like pub spec --name foo --description "Foo bar", especially if pub gets tab completion in the future.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/8631949?v=3" align="left" width="48" height="48"hspace="10"> Comment by floitschG

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Removed Type-Defect label.
Added Type-Enhancement, Area-Pub, Triaged labels.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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Added Duplicate label.
Marked as being merged into #34.