bug: fix issue in laplacian missing to pass kind

Author: mrava87

pylops/basicoperators/laplacian.py

@@ -126,6 +126,6 @@ def _calc_l2op(
         l2op *= weights[0]
         for ax, samp, weight in zip(axes[1:], sampling[1:], weights[1:]):
             l2op += weight * SecondDerivative(
-                dims, axis=ax, sampling=samp, edge=edge, dtype=dtype
+                dims, axis=ax, sampling=samp, edge=edge, kind=kind, dtype=dtype
             )
         return l2op

pylops/basicoperators/secondderivative.py

@@ -64,7 +64,7 @@ class SecondDerivative(LinearOperator):
     direction of a multi-dimensional array.
 
     For simplicity, given a one dimensional array, the second-order centered
-    first derivative is:
+    second derivative is:
 
     .. math::
         y[i] = (x[i+1] - 2x[i] + x[i-1]) / \Delta x^2