Minor modifications.

src/DynareSolvers.jl

@@ -89,7 +89,6 @@ function dogleg!(x::Vector{Float64}, r::Matrix{Float64}, b::Vector{Float64}, d::
         # gnorm = norm(s)
         if gnorm>0
             # Normalize and rescale → gradient direction.
-            temp0 = zero(Float64)
             @inbounds for i = 1:n
                 s[i] /= gnorm*d[i]
             end
@@ -101,8 +100,8 @@ function dogleg!(x::Vector{Float64}, r::Matrix{Float64}, b::Vector{Float64}, d::
                 end
                 temp0 += temp1*temp1
             end
+            sgnorm = gnorm/temp0
             temp0 = sqrt(temp0)
-            sgnorm = gnorm/(temp0*temp0)
             if sgnorm<=δ
                 # The scaled gradient direction is not acceptable…
                 # Compute the point along the dogleg at which the
@@ -154,7 +153,7 @@ end
     trustregion(f!::Function, j!::Function, y0::Vector{Float64}, factor::Float64, tolf::Float64, tolx::Float64, maxiter::Int, wa::TrustRegionWA)
 
 Solves a system of nonlinear equations of several variables using a trust region method. This version requires a last argument of type `TrustRegionWA`
-which holds various working arrays used in the function (avoiding array instantiations). Results of the solver are available in `wa.x` if `info=1`. 
+which holds various working arrays used in the function (avoiding array instantiations). Results of the solver are available in `wa.x` if `info=1`.
 
 # Arguments
 - `f!::Function`: Function evaluating the residuals of the nonlinear equations to be solved. This function admits two arguments, a vector holding the values of the residuals and the vector of unknowns (to be solved for).
@@ -272,7 +271,7 @@ function trustregion(f!::Function, j!::Function, x0::Vector{Float64}, factor::Fl
             if ratio<p1
                 # Reduction is much smaller than predicted… Reduce the radius of the trust region.
                 ncsucc = 0
-                δ = p5*δ
+                δ *= p5
             else
                 ncsucc += 1
                 if ratio>=p5 || ncsucc>1