To-do: Use `redden!` and `deredden!`

[icweaver]

Call these functions from DustExtinction.jl directly once it's implemented

Depends on: JuliaAstro/DustExtinction.jl#82

[Akshat1000Sharma]

Hi @icweaver ! I have opened a PR addressing the issue.

The change in my PR avoids repeated construction of the extinction law object inside redden! and deredden! by instantiating the law once and then broadcasting the DustExtinction.redden / DustExtinction.deredden calls across the spectrum.

The public API of Spectra.jl remains unchanged.

For now the implementation continues to use DustExtinction.redden and DustExtinction.deredden, since the in-place versions (redden! / deredden!) are not yet available in any released version of DustExtinction.jl.

Once the upstream draft PR introducing those functions is merged or another PR implements them:

JuliaAstro/DustExtinction.jl#84

Spectra.jl could potentially simplify this further by delegating directly to those functions in the future, just as you said.

PR: #48

Excited to work on this project for GSoC.
I will be really grateful if you can suggest any other issues to work on this project.