Column headers out of alignment in 10 MInutes tutorial
Beginning at line `In [93]:` in getting_started/10min.html, the column headers of the output data frames go out of alignment.

Is this meant to have a semantic meaning that is not addressed by the tutorial commentary?

#### Code Sample, a copy-pastable example if possible

```python
df = pd.DataFrame({'A': ['foo', 'bar', 'foo', 'bar',
                                         'foo', 'bar', 'foo', 'foo'],
                                   'B': ['one', 'one', 'two', 'three',
                                          'two', 'two', 'one', 'three'],
                                   'C': np.random.randn(8),
                                   'D': np.random.randn(8)})
df.groupby('A').sum()
```
#### Problem description

Output column headers do not line up as expected

                C        D
    A                     
    bar -2.802588  2.42611
    foo  3.146492 -0.63958

#### Expected Output

    A         C         D   
    bar -2.802588  2.42611
    foo  3.146492 -0.63958

#### Output of ``pd.show_versions()``

<details>
INSTALLED VERSIONS
------------------
commit: None
python: 3.7.3.final.0
python-bits: 64
OS: Darwin
OS-release: 15.6.0
machine: x86_64
processor: i386
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
LOCALE: en_US.UTF-8

pandas: 0.24.2
pytest: 4.3.1
pip: 19.0.3
setuptools: 40.8.0
Cython: 0.29.6
numpy: 1.16.2
scipy: 1.2.1
pyarrow: None
xarray: None
IPython: 7.4.0
sphinx: 1.8.5
patsy: 0.5.1
dateutil: 2.8.0
pytz: 2018.9
blosc: None
bottleneck: 1.2.1
tables: 3.5.1
numexpr: 2.6.9
feather: None
matplotlib: 3.0.3
openpyxl: 2.6.1
xlrd: 1.2.0
xlwt: 1.3.0
xlsxwriter: 1.1.5
lxml.etree: 4.3.2
bs4: 4.7.1
html5lib: 1.0.1
sqlalchemy: 1.3.1
pymysql: None
psycopg2: None
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: 0.7.0
gcsfs: None
</details>
