Apply suggestions from code review

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

Author: MohamedLaghdafHABIBOULLAH

src/LM_alg.jl

@@ -249,7 +249,7 @@ function LM(
       jtprod_residual!(nls, xk, Fk, ∇fk)
 
       # update opnorm if not linear least squares
-      if nonlinear == true
+      if nonlinear
         σmax = opnorm(Jk)      
       end
 
@@ -260,7 +260,6 @@ function LM(
       σk = σk * γ
     end
     νInv = (1 + θ) * (σmax^2 + σk)  # ‖J'J + σₖ I‖ = ‖J‖² + σₖ
-
     tired = k ≥ maxIter || elapsed_time > maxTime
   end