Update src/linesearch.jl

Co-authored-by: Vaibhav Kumar Dixit <vaibhavyashdixit@gmail.com>

Author: avik-pal

src/linesearch.jl

@@ -51,7 +51,7 @@ function __generic_init(alg::LiFukushimaLineSearch, prob, fu, u)
     T = promote_type(eltype(fu), eltype(u))
 
     ϕ = @closure (u, δu, α) -> begin
-        u_cache = @. u + α * δu
+        @. u_cache = u + α * δu
         return NONLINEARSOLVE_DEFAULT_NORM(__eval_f(prob, fu_cache, u_cache))
     end