add keyword alias_u0 with default value false

[ranocha]

Cf. #654 (comment) and #640.

This is my first PR changing some keyword arguments. Hence, it should be reviewed carefully because I might have missed some connections to other parts.

[ChrisRackauckas]

I'm not sure this is actually necessary since it's not used for anything.

[ranocha]

I'll remove it.

[ChrisRackauckas]

This looks good, but we need to change the other solver packages as well to keep uniformity in the common interface.

[ranocha]

Is this list of packages that have to be updated complete?

• add keyword alias_u0 with default value false StochasticDiffEq.jl#133
• https://github.com/JuliaDiffEq/DelayDiffEq.jl: Does not need an update because it forwards kwargs to other packages.
• add keyword alias_u0 with default value false DASKR.jl#33
• add keyword alias_u0 with default value false ODE.jl#147
• add keyword alias_u0 with default value false ODEInterfaceDiffEq.jl#18
• add keyword alias_u0 with default value false Sundials.jl#195
• add keyword alias_u0 with default value false GeometricIntegratorsDiffEq.jl#1
• https://github.com/JuliaDiffEq/BridgeDiffEq.jl u0 cannot be aliased here.
• add keyword alias_u0 with default value false rveltz/LSODA.jl#56

[ChrisRackauckas]

I think DelayDiffEq might be fine. GeometricIntegratorsDiffEq.jl and BridgeDiffEq.jl should get an update though tests are failing, and LSODA.jl should update.

[ranocha]

Okay. I've missed LSODA.jl because it's not part of JuliaDiffEq.

[ranocha]

I can't really see a possibility for aliasing for https://github.com/JuliaDiffEq/BridgeDiffEq.jl.

[ChrisRackauckas]

Yes that just uses small immutables.

[devmotion]

I think DelayDiffEq might be fine.

Maybe it would be more intuitive to never alias the ODEIntegrator that is created in DelayDiffEq but depending on the keyword alias_u0 change the DDEIntegrator in https://github.com/JuliaDiffEq/DelayDiffEq.jl/blob/master/src/solve.jl#L114-L117?

[ChrisRackauckas]

True that would make sense.