Merge pull request #8691 from sangheestyle/master

CLN: fix grammar in extract_index error message

Author: jorisvandenbossche

pandas/core/frame.py

@@ -4707,7 +4707,7 @@ def extract_index(data):
                 raw_lengths.append(len(v))
 
         if not indexes and not raw_lengths:
-            raise ValueError('If using all scalar values, you must must pass'
+            raise ValueError('If using all scalar values, you must pass'
                              ' an index')
 
         if have_series or have_dicts:

pandas/tests/test_frame.py

@@ -2625,7 +2625,7 @@ def test_constructor_error_msgs(self):
         with assertRaisesRegexp(ValueError, "Shape of passed values is \(3, 2\), indices imply \(2, 2\)"):
             DataFrame(np.random.rand(2,3), columns=['A', 'B'], index=[1, 2])
 
-        with assertRaisesRegexp(ValueError, 'If using all scalar values, you must must pass an index'):
+        with assertRaisesRegexp(ValueError, 'If using all scalar values, you must pass an index'):
             DataFrame({'a': False, 'b': True})
 
     def test_constructor_with_embedded_frames(self):