Fix incorrect value display for auto string width

matrepr/adapters/__init__.py

@@ -397,12 +397,7 @@ def drop_column(self):
                 drop = self.dot_col
         else:
             assert self.dot_col <= old_dot_col
-            if self.dot_col == 0:
-                drop = self.dot_col
-            elif self.dot_col < old_dot_col:
-                drop = self.dot_col - 1
-            else:
-                drop = self.dot_col
+            drop = self.dot_col
 
         # adjust metadata
         self.display_shape[1] -= 1

tests/test_numpy.py

@@ -67,6 +67,22 @@ def test_large_size(self):
             res = to_latex(mat, max_rows=None, max_cols=None)
             self.assertNotIn("dots", res)
 
+    def test_gh_35(self):
+        mat = np.arange(5000).reshape(2, 2500)
+        res = to_str(mat, width_str=50)
+        self.assertNotIn("6 ", res)
+
+    def test_auto_width_str_vals(self):
+        mat = np.arange(5000)
+        # Try a range of string widths.
+        for width_str in range(1, 200):
+            res = to_str(mat, width_str=width_str)
+            # The header has the expected matrix value, so compare the two.
+            lines = res.split("\n")
+            headers = lines[1].split()
+            vals = lines[2].replace("...", " ").replace("[", "").replace("]", "").split()
+            self.assertEqual(headers, vals)
+
 
 if __name__ == '__main__':
     unittest.main()