Figure.grdview: Fix typo in docs (#3093)

Author: yvonnefroehlich

pygmt/src/grdview.py

@@ -63,8 +63,8 @@ def grdview(self, grid, **kwargs):
         The name of the color palette table to use.
     drapegrid : str or xarray.DataArray
         The file name or a DataArray of the image grid to be draped on top
-        of the relief provided by grid. [Default determines colors from
-        grid]. Note that ``zscale`` and ``plane`` always refers to the grid.
+        of the relief provided by ``grid`` [Default determines colors from grid].
+        Note that ``zscale`` and ``plane`` always refer to the grid.
         The drapegrid only provides the information pertaining to colors, which
         (if drapegrid is a grid) will be looked-up via the CPT (see ``cmap``).
     plane : float or str