fix for ruff rule D301

.ruff.toml

@@ -42,7 +42,6 @@ lint.ignore = [
     "D211",  # No blank lines allowed before class docstring
     "D214",  # Section is over-indented
     "D300",  # triple double quotes `""" / Use triple single quotes `'''`
-    "D301",  # Use `r"""` if any backslashes in a docstring
     "D400",  # First line should end with a period
     "D401",  # First line of docstring should be in imperative mood: ...
     "D403",  # First word of the first line should be capitalized

benchmarks/benchmarks/cperf/equality.py

@@ -9,7 +9,7 @@
 
 
 class EqualityMixin(SingleDiagnosticMixin):
-    """Uses :class:`SingleDiagnosticMixin` as the realistic case will be comparing
+    r"""Uses :class:`SingleDiagnosticMixin` as the realistic case will be comparing
     :class:`~iris.cube.Cube`\\ s that have been loaded from file.
     """
 
@@ -24,7 +24,7 @@ def setup(self, file_type, three_d=False, three_times=False):
 
 @on_demand_benchmark
 class CubeEquality(EqualityMixin):
-    """Benchmark time and memory costs of comparing LFRic and UM
+    r"""Benchmark time and memory costs of comparing LFRic and UM
     :class:`~iris.cube.Cube`\\ s.
     """
 

benchmarks/benchmarks/sperf/equality.py

@@ -10,7 +10,7 @@
 
 @on_demand_benchmark
 class CubeEquality(FileMixin):
-    """Benchmark time and memory costs of comparing :class:`~iris.cube.Cube`\\ s
+    r"""Benchmark time and memory costs of comparing :class:`~iris.cube.Cube`\\ s
      with attached :class:`~iris.experimental.ugrid.mesh.Mesh`\\ es.
 
     Uses :class:`FileMixin` as the realistic case will be comparing

lib/iris/_constraints.py

@@ -33,7 +33,7 @@ def __init__(self, name=None, cube_func=None, coord_values=None, **kwargs):
         ----------
         name : str or None, optional
             If a string, it is used as the name to match against the
-            :attr:`iris.cube.Cube.names` property. TREMTEST
+            :attr:`iris.cube.Cube.names` property.
         cube_func : callable or None, optional
             If a callable, it must accept a Cube as its first and only argument
             and return either True or False.

lib/iris/_merge.py

@@ -525,7 +525,7 @@ def _is_combination(name):
 
 
 def build_indexes(positions):
-    """Construct a mapping for each candidate dimension that maps for each
+    r"""Construct a mapping for each candidate dimension that maps for each
     of its scalar values the set of values for each of the other candidate
     dimensions.
 

lib/iris/cube.py

@@ -752,7 +752,7 @@ def _is_single_item(testee):
 
 
 class CubeAttrsDict(MutableMapping):
-    """A :class:`dict`\\-like object for :attr:`iris.cube.Cube.attributes`,
+    r"""A :class:`dict`\\-like object for :attr:`iris.cube.Cube.attributes`,
     providing unified user access to combined cube "local" and "global" attributes
     dictionaries, with the access behaviour of an ordinary (single) dictionary.
 
@@ -2018,7 +2018,7 @@ def coords(
         dim_coords=None,
         mesh_coords=None,
     ):
-        """Return a list of coordinates from the :class:`Cube` that match the
+        r"""Return a list of coordinates from the :class:`Cube` that match the
         provided criteria.
 
         .. seealso::
@@ -2184,7 +2184,7 @@ def coord(
         dim_coords=None,
         mesh_coords=None,
     ):
-        """Return a single coordinate from the :class:`Cube` that matches the
+        r"""Return a single coordinate from the :class:`Cube` that matches the
         provided criteria.
 
         .. note::
@@ -2359,7 +2359,7 @@ def _any_meshcoord(self):
 
     @property
     def mesh(self):
-        """Return the unstructured :class:`~iris.experimental.ugrid.Mesh`
+        r"""Return the unstructured :class:`~iris.experimental.ugrid.Mesh`
         associated with the cube, if the cube has any
         :class:`~iris.experimental.ugrid.MeshCoord`\\ s,
         or ``None`` if it has none.
@@ -2379,7 +2379,7 @@ def mesh(self):
 
     @property
     def location(self):
-        """Return the mesh "location" of the cube data, if the cube has any
+        r"""Return the mesh "location" of the cube data, if the cube has any
         :class:`~iris.experimental.ugrid.MeshCoord`\\ s,
         or ``None`` if it has none.
 
@@ -2398,7 +2398,7 @@ def location(self):
         return result
 
     def mesh_dim(self):
-        """Return the cube dimension of the mesh, if the cube has any
+        r"""Return the cube dimension of the mesh, if the cube has any
         :class:`~iris.experimental.ugrid.MeshCoord`\\ s,
         or ``None`` if it has none.
 

lib/iris/exceptions.py

@@ -176,7 +176,7 @@ class CannotAddError(ValueError):
 
 
 class IrisUserWarning(UserWarning):
-    """Base class for :class:`UserWarning`\\ s generated by Iris."""
+    r"""Base class for :class:`UserWarning`\\ s generated by Iris."""
 
     pass
 

lib/iris/experimental/ugrid/load.py

@@ -3,7 +3,7 @@
 # This file is part of Iris and is released under the BSD license.
 # See LICENSE in the root of the repository for full licensing details.
 
-"""Extensions to Iris' NetCDF loading to allow the construction of
+r"""Extensions to Iris' NetCDF loading to allow the construction of
 :class:`~iris.experimental.ugrid.mesh.Mesh`\\ es from UGRID data in the file.
 
 Eventual destination: :mod:`iris.fileformats.netcdf`.
@@ -143,7 +143,7 @@ def load_mesh(uris, var_name=None):
 
 
 def load_meshes(uris, var_name=None):
-    """Load :class:`~iris.experimental.ugrid.mesh.Mesh` objects from one or more NetCDF files.
+    r"""Load :class:`~iris.experimental.ugrid.mesh.Mesh` objects from one or more NetCDF files.
 
     Parameters
     ----------

lib/iris/experimental/ugrid/mesh.py

@@ -659,7 +659,7 @@ def normalise(element, axis):
 
     @classmethod
     def from_coords(cls, *coords):
-        """Construct a :class:`Mesh` by derivation from one or more
+        r"""Construct a :class:`Mesh` by derivation from one or more
         :class:`~iris.coords.Coord`\\ s.
 
         The :attr:`~Mesh.topology_dimension`, :class:`~iris.coords.Coord`
@@ -1865,7 +1865,7 @@ def to_MeshCoord(self, location, axis):
         return MeshCoord(mesh=self, location=location, axis=axis)
 
     def to_MeshCoords(self, location):
-        """Generate a tuple of
+        r"""Generate a tuple of
         :class:`~iris.experimental.ugrid.mesh.MeshCoord`\\ s, each referencing
         the current :class:`Mesh`, one for each :attr:`AXES` value, passing
         through the ``location`` argument.

lib/iris/fileformats/_nc_load_rules/engine.py

@@ -20,7 +20,7 @@
 
 
 class FactEntity:
-    """An object with an 'entity_lists' property  which is a dict of 'FactList's.
+    r"""An object with an 'entity_lists' property  which is a dict of 'FactList's.
 
     A Factlist, in turn, is an object with property 'case_specific_facts',
     which is a list of tuples of strings

lib/iris/pandas.py

@@ -192,7 +192,7 @@ def as_cubes(
     cell_measure_cols=None,
     ancillary_variable_cols=None,
 ):
-    """Convert a Pandas Series/DataFrame into n-dimensional Iris Cubes, including dimensional metadata.
+    r"""Convert a Pandas Series/DataFrame into n-dimensional Iris Cubes, including dimensional metadata.
 
     The index of `pandas_structure` will be used for generating the
     :class:`~iris.cube.Cube` dimension(s) and :class:`~iris.coords.DimCoord`\\ s.
@@ -617,7 +617,7 @@ def as_data_frame(
     add_cell_measures=False,
     add_ancillary_variables=False,
 ):
-    """Convert a :class:`~iris.cube.Cube` to a :class:`pandas.DataFrame`.
+    r"""Convert a :class:`~iris.cube.Cube` to a :class:`pandas.DataFrame`.
 
     :attr:`~iris.cube.Cube.dim_coords` and :attr:`~iris.cube.Cube.data` are
     flattened into a long-style :class:`~pandas.DataFrame`.  Other

lib/iris/tests/test_coding_standards.py

@@ -125,7 +125,7 @@ def test_python_versions():
 
 
 def test_categorised_warnings():
-    """To ensure that all UserWarnings raised by Iris are categorised, for ease of use.
+    r"""To ensure that all UserWarnings raised by Iris are categorised, for ease of use.
 
     No obvious category? Use the parent:
     :class:`iris.exceptions.IrisUserWarning`.
@@ -182,7 +182,7 @@ class _WarnComboCfDefaulting(IrisCfWarning, IrisDefaultingWarning):
 class TestLicenseHeaders(tests.IrisTest):
     @staticmethod
     def whatchanged_parse(whatchanged_output):
-        """Returns a generator of tuples of data parsed from
+        r"""Returns a generator of tuples of data parsed from
         "git whatchanged --pretty='TIME:%at". The tuples are of the form
         ``(filename, last_commit_datetime)``
 

lib/iris/tests/unit/coords/test__DimensionalMetadata.py

@@ -172,7 +172,7 @@ def coord_representations(self, *args, **kwargs):
         return self.repr_str_strings(coord)
 
     def assertLines(self, list_of_expected_lines, string_result):
-        """Assert equality between a result and expected output lines.
+        r"""Assert equality between a result and expected output lines.
 
         For convenience, the 'expected lines' are joined with a '\\n',
         because a list of strings is nicer to construct in code.