Corrected the grammar in Exception

pandas/core/apply.py

@@ -355,7 +355,7 @@ def wrap_results_for_axis(
         try:
             result = self.obj._constructor(data=results)
         except ValueError as err:
-            if "arrays must all be same length" in str(err):
+            if "All arrays must be of the same length" in str(err):
                 # e.g. result = [[2, 3], [1.5], ['foo', 'bar']]
                 #  see test_agg_listlike_result GH#29587
                 res = self.obj._constructor_sliced(results)

pandas/core/internals/construction.py

@@ -398,7 +398,7 @@ def extract_index(data) -> Index:
         if have_raw_arrays:
             lengths = list(set(raw_lengths))
             if len(lengths) > 1:
-                raise ValueError("arrays must all be same length")
+                raise ValueError("All arrays must be of the same length")
 
             if have_dicts:
                 raise ValueError(

pandas/tests/frame/test_constructors.py

@@ -1367,7 +1367,7 @@ class CustomDict(dict):
 
     def test_constructor_ragged(self):
         data = {"A": np.random.randn(10), "B": np.random.randn(8)}
-        with pytest.raises(ValueError, match="arrays must all be same length"):
+        with pytest.raises(ValueError, match="All arrays must be of the same length"):
             DataFrame(data)
 
     def test_constructor_scalar(self):