v2.45 broke plotting with idxs as a tuple with a function

[ranocha]

Describe the bug 🐞

I get the error in the MWE below.

Expected behavior

It works fine as it does with SciMLBase v2.44.

Minimal Reproducible Example 👇

(@v1.10) pkg> activate --temp

(jl_BAfTFJ) pkg> add SciMLBase@2.45 OrdinaryDiffEq Plots

julia> using OrdinaryDiffEq, Plots

julia> ode = ODEProblem((du, u, p, t) -> du .= u, [1.0], (0.0, 1.0))

julia> sol = solve(ode, Tsit5());
julia> plot(sol, idxs = ((t, u) -> (t, 2 * u), 0, 1))
ERROR: Incorrect specification of `idxs`
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:35
  [2] (::ODESolution{…})(t::Vector{…}, ::Type{…}, idxs::Vector{…}, continuity::Symbol)
    @ SciMLBase ~/.julia/packages/SciMLBase/jh7eV/src/solutions/ode_solutions.jl:331
  [3] #_#480
    @ ~/.julia/packages/SciMLBase/jh7eV/src/solutions/ode_solutions.jl:215 [inlined]
  [4] AbstractODESolution
    @ ~/.julia/packages/SciMLBase/jh7eV/src/solutions/ode_solutions.jl:210 [inlined]
  [5] solplot_vecs_and_labels(dims::Int64, vars::Vector{…}, plott::Vector{…}, sol::ODESolution{…}, plot_analytic::Bool, plot_analytic_timeseries::Nothing)
    @ SciMLBase ~/.julia/packages/SciMLBase/jh7eV/src/solutions/solution_interface.jl:494
  [6] diffeq_to_arrays(sol::ODESolution{…}, plot_analytic::Bool, denseplot::Bool, plotdensity::Int64, tspan::Nothing, vars::Vector{…}, tscale::Symbol, plotat::Nothing)
    @ SciMLBase ~/.julia/packages/SciMLBase/jh7eV/src/solutions/solution_interface.jl:388
  [7] macro expansion
    @ ~/.julia/packages/SciMLBase/jh7eV/src/solutions/solution_interface.jl:205 [inlined]
  [8] macro expansion
    @ ~/.julia/packages/RecipesBase/BRe07/src/RecipesBase.jl:340 [inlined]
  [9] macro expansion
    @ ~/.julia/packages/SciMLBase/jh7eV/src/solutions/solution_interface.jl:199 [inlined]
 [10] apply_recipe(plotattributes::AbstractDict{Symbol, Any}, sol::SciMLBase.AbstractTimeseriesSolution)
    @ SciMLBase ~/.julia/packages/RecipesBase/BRe07/src/RecipesBase.jl:300
 [11] _process_userrecipes!(plt::Any, plotattributes::Any, args::Any)
    @ RecipesPipeline ~/.julia/packages/RecipesPipeline/BGM3l/src/user_recipe.jl:38
 [12] recipe_pipeline!(plt::Any, plotattributes::Any, args::Any)
    @ RecipesPipeline ~/.julia/packages/RecipesPipeline/BGM3l/src/RecipesPipeline.jl:72
 [13] _plot!(plt::Plots.Plot, plotattributes::Any, args::Any)
    @ Plots ~/.julia/packages/Plots/du2dt/src/plot.jl:223
 [14] plot(args::Any; kw...)
    @ Plots ~/.julia/packages/Plots/du2dt/src/plot.jl:102
 [15] top-level scope
    @ REPL[6]:1
Some type information was truncated. Use `show(err)` to see complete types.

Likely caused by #645

[ChrisRackauckas]

@AayushSabharwal I didn't see this in your test cases?

[AayushSabharwal]

What are all the valid inputs to idxs?

[ranocha]

This one is documented in https://docs.sciml.ai/DiffEqDocs/stable/basics/plot/#plot_vars