astropy ascii output names issue

gistfile1.txt

In [1]: from astropy.io import ascii

In [2]: from astropy.table import Table

In [3]: data = {'x': [1, 2, 3],
   ...:         'y': [4, 5.2, 6.1],
   ...:         'z': [8, 9, 'hello world']}

In [4]: import sys

In [5]: ascii.write(data, sys.stdout, Writer=ascii.FixedWidth)
|   y | x |           z |
| 4.0 | 1 |           8 |
| 5.2 | 2 |           9 |
| 6.1 | 3 | hello world |

In [7]: ascii.write(data, sys.stdout, names=['x','y','z'], Writer=ascii.FixedWidth)
| x |   y |           z |
| 1 | 4.0 |           8 |
| 2 | 5.2 |           9 |
| 3 | 6.1 | hello world |

In [8]: t = Table(data)

In [10]: t.write(sys.stdout, format='ascii', Writer=ascii.FixedWidth)
|   y | x |           z |
| 4.0 | 1 |           8 |
| 5.2 | 2 |           9 |
| 6.1 | 3 | hello world |

In [11]: t.write(sys.stdout, format='ascii', names=['x','y','z'], Writer=ascii.FixedWidth)
|   x | y |           z |
| 4.0 | 1 |           8 |
| 5.2 | 2 |           9 |
| 6.1 | 3 | hello world |

In [12]: ascii.write(t, sys.stdout, Writer=ascii.FixedWidth)
|   y | x |           z |
| 4.0 | 1 |           8 |
| 5.2 | 2 |           9 |
| 6.1 | 3 | hello world |

In [13]: ascii.write(t, sys.stdout, names=['x','y','z'], Writer=ascii.FixedWidth)
|   x | y |           z |
| 4.0 | 1 |           8 |
| 5.2 | 2 |           9 |
| 6.1 | 3 | hello world |