Apply formatting suggestions from code review

Co-authored-by: Copilot <[email protected]>

Author: MaxenceGollier

src/R2N.jl

@@ -299,7 +299,6 @@ function SolverCore.solve!(
   else
     λmax = power_method!(solver.subpb.model.B, solver.v0, solver.subpb.model.v, opnorm_maxiter)
   end
-  
   found_λ || error("operator norm computation failed")
 
   ν₁ = θ / (λmax + σk)
@@ -454,7 +453,6 @@ function SolverCore.solve!(
       else
         λmax = power_method!(solver.subpb.model.B, solver.v0, solver.subpb.model.v, opnorm_maxiter)
       end
-      
       found_λ || error("operator norm computation failed")
     end
 

src/utils.jl

@@ -3,7 +3,7 @@ export RegularizedExecutionStats
 import SolverCore.GenericExecutionStats
 
 function power_method!(B::M, v₀::S, v₁::S, max_iter::Int = 1) where{M, S}
-  @assert max_iter >= 1 
+  @assert max_iter >= 1 "max_iter must be at least 1."
   mul!(v₁, B, v₀)
   normalize!(v₁) # v1 = B*v0 / ‖B*v0‖
   for i = 2:max_iter