formatting

package/MDAnalysis/core/groups.py

@@ -3255,14 +3255,14 @@ def select_atoms(self, sel, *othersel, periodic=True, rtol=1e-05,
                 coordinate greater than 5.0; ``prop abs z <= 5.0`` selects all
                 atoms within -5.0 <= z <= 5.0.
             relprop [abs] *property*  *operator*  *value*  *selection*
-                selects atoms based on position relative to the center of 
-                geometry (COG) of a given selection, using *property*  
-                **x**, **y**, or **z** coordinate. Supports the **abs** 
-                keyword (for absolute value) and the following 
+                selects atoms based on position relative to the center of
+                geometry (COG) of a given selection, using *property*
+                **x**, **y**, or **z** coordinate. Supports the **abs**
+                keyword (for absolute value) and the following
                 *operators*: **<, >, <=, >=, ==, !=**.
-                For example, ``relprop z >= 5.0 protein`` selects all atoms 
-                with z coordinate greater than 5.0 relative to the COG 
-                of protein; ``relprop abs z <= 5.0 protein`` selects all 
+                For example, ``relprop z >= 5.0 protein`` selects all atoms
+                with z coordinate greater than 5.0 relative to the COG
+                of protein; ``relprop abs z <= 5.0 protein`` selects all
                 atoms within -5.0 <= z <= 5.0 relative to the COG of protein.
             sphzone *radius* *selection*
                 Selects all atoms that are within *radius* of the center of

testsuite/MDAnalysisTests/core/test_atomselections.py

@@ -1092,7 +1092,7 @@ def test_invalid_relprop_selection(self, universe):
             universe.select_atoms("relprop parsnip < 2 index 0")
         with pytest.raises(SelectionError, match="Unknown selection token"):
             universe.select_atoms("relprop z < 2")
-        with pytest.raises(SelectionError, match="Expected one of x y z for property"):
+        with pytest.raises(SelectionError, match="Expected one of"):
             universe.select_atoms("relprop id < 2 index 0")
         empty_universe = mda.Universe.empty(
             6, 2, atom_resindex=[0, 0, 0, 1, 1, 1]