MNT: Fix indentation on generated docstring

Python 3.13 started stripping leading whitespace in docstrings, so we
need to be more careful to match the indentation of the rest of the
docstring. Failing to do so results in warnings from docutils when
building the docs.

src/metpy/calc/tools.py

@@ -6,6 +6,7 @@
 import functools
 from inspect import Parameter, signature
 from operator import itemgetter
+import textwrap
 
 import numpy as np
 
@@ -982,32 +983,35 @@ def wrapper(f, **kwargs):
 
 def _add_grid_params_to_docstring(docstring: str, orig_includes: dict) -> str:
     """Add documentation for some dynamically added grid parameters to the docstring."""
-    other_params = docstring.find('Other Parameters')
-    blank = docstring.find('\n\n', other_params)
+    other_params = 'Other Parameters'
+    other_ind = docstring.find(other_params)
+    indent = docstring.find('-', other_ind) - other_ind - len(other_params) - 1  # -1 for \n
+    blank = docstring.find('\n\n', other_ind)
 
     entries = {
         'longitude': """
-    longitude : `pint.Quantity`, optional
-        Longitude of data. Optional if `xarray.DataArray` with latitude/longitude coordinates
-        used as input. Also optional if parallel_scale and meridional_scale are given. If
-        otherwise omitted, calculation will be carried out on a Cartesian, rather than
-        geospatial, grid. Keyword-only argument.""",
+longitude : `pint.Quantity`, optional
+    Longitude of data. Optional if `xarray.DataArray` with latitude/longitude coordinates
+    used as input. Also optional if parallel_scale and meridional_scale are given. If
+    otherwise omitted, calculation will be carried out on a Cartesian, rather than
+    geospatial, grid. Keyword-only argument.""",
         'latitude': """
-    latitude : `pint.Quantity`, optional
-        Latitude of data. Optional if `xarray.DataArray` with latitude/longitude coordinates
-        used as input. Also optional if parallel_scale and meridional_scale are given. If
-        otherwise omitted, calculation will be carried out on a Cartesian, rather than
-        geospatial, grid. Keyword-only argument.""",
+latitude : `pint.Quantity`, optional
+    Latitude of data. Optional if `xarray.DataArray` with latitude/longitude coordinates
+    used as input. Also optional if parallel_scale and meridional_scale are given. If
+    otherwise omitted, calculation will be carried out on a Cartesian, rather than
+    geospatial, grid. Keyword-only argument.""",
         'crs': """
-    crs : `pyproj.crs.CRS`, optional
-        Coordinate Reference System of data. Optional if `xarray.DataArray` with MetPy CRS
-        used as input. Also optional if parallel_scale and meridional_scale are given. If
-        otherwise omitted, calculation will be carried out on a Cartesian, rather than
-        geospatial, grid. Keyword-only argument."""
+crs : `pyproj.crs.CRS`, optional
+    Coordinate Reference System of data. Optional if `xarray.DataArray` with MetPy CRS
+    used as input. Also optional if parallel_scale and meridional_scale are given. If
+    otherwise omitted, calculation will be carried out on a Cartesian, rather than
+    geospatial, grid. Keyword-only argument."""
     }
 
     return ''.join([docstring[:blank],
-                    *(entries[p] for p, included in orig_includes.items() if not included),
+                    *(textwrap.indent(entries[p], ' ' * indent)
+                      for p, included in orig_includes.items() if not included),
                     docstring[blank:]])