updating the docs of laplacian

src/metpy/calc/tools.py

@@ -1439,10 +1439,13 @@ def gradient(f, axes=None, coordinates=None, deltas=None):
 
 @exporter.export
 def laplacian(f, axes=None, coordinates=None, deltas=None):
-    """Calculate the laplacian of a grid of values using finite difference technique (centered finite difference in the middle and forward/backward at the boundaries, see metpy.calc.second_derivative for more information).
+    """Calculate the laplacian of a grid of values.
 
     Works for both regularly-spaced data, and grids with varying spacing.
 
+    Calculation is done using finite difference technique (centered finite difference in the middle and 
+    forward/backward at the boundaries, see metpy.calc.second_derivative for more information).
+
     Either `coordinates` or `deltas` must be specified, or `f` must be given as an
     `xarray.DataArray` with  attached coordinate and projection information. If `f` is an
     `xarray.DataArray`, and `coordinates` or `deltas` are given, `f` will be converted to a