Apply suggestions from code review

Author: tmigot

src/NLPModelsIpopt.jl

@@ -94,7 +94,7 @@ function SolverCore.reset!(solver::IpoptSolver, nlp::AbstractNLPModel)
   @assert nlp.meta.ncon == problem.m
 
   problem.obj_val = Inf
-  problem.status = 0
+  problem.status = -1
   problem.x .= nlp.meta.x0
   eval_f, eval_g, eval_grad_f, eval_jac_g, eval_h = set_callbacks(nlp)
   problem.eval_f = eval_f
@@ -111,7 +111,6 @@ end
 function SolverCore.reset!(solver::IpoptSolver)
   problem = solver.problem
 
-  # Reset solver state to initial values
   problem.obj_val = Inf
   problem.status = -1  # Use -1 to indicate not solved yet
   problem.intermediate = nothing

test/runtests.jl

@@ -125,7 +125,7 @@ end
   solver = IpoptSolver(nlp)
 
   # Solve the problem first
-  stats = solve!(solver, nlp, stats, print_level=0)
+  stats = solve!(solver, nlp, stats, print_level = 0)
   @test stats.status == :first_order
   @test isapprox(stats.solution, [1.0; 1.0], atol = 1e-6)
 
@@ -134,7 +134,7 @@ end
   reset!(solver)
 
   # Solve again with new initial guess
-  stats = solve!(solver, nlp, stats, print_level=0)
+  stats = solve!(solver, nlp, stats, print_level = 0)
   @test stats.status == :first_order
   @test isapprox(stats.solution, [1.0; 1.0], atol = 1e-6)
 end