Address Copilot review comments

Author: tomvothecoder

docs/api.rst

@@ -42,7 +42,7 @@ Below is a list of top-level API functions that are available in ``xcdat``.
 Module-level API Functions
 --------------------------
 
-Below is a list of model-level API functions that are available in ``xcdat``.
+Below is a list of module-level API functions that are available in ``xcdat``.
 
 .. autosummary::
     :toctree: generated/

tests/test_mask.py

@@ -201,8 +201,7 @@ def test_mask_fractional(self, ds):
         xr.testing.assert_allclose(output.ts, expected_sea)
 
         # invert expected
-        expected_land = expected_sea.copy()
-        expected_land = xr.where(expected_sea == 1, np.nan, expected_land)
+        expected_land = xr.where(expected_sea == 1, np.nan, expected_sea)
         expected_land = xr.where(np.isnan(expected_sea), 1.0, np.nan)
 
         output = mask.generate_and_apply_land_sea_mask(

xcdat/spatial.py

@@ -140,7 +140,7 @@ def mask_sea(
         method: str = "regionmask",
         criteria: float | None = None,
         mask: xr.DataArray | None = None,
-        output_mask: bool = False,
+        output_mask: bool | str = False,
         **options: Any,
     ):
         """
@@ -166,7 +166,7 @@ def mask_sea(
         **options : Any
             These options are passed directly to the ``method``. See specific
             method documentation for available options:
-            :func:`xcdat.mask.pcmdi_land_sea_mask` for PCMDI options
+            :func:`xcdat.mask.pcmdi_land_sea_mask` for PCMDI options.
 
         Returns
         -------