Typing error in "ExcelFile class" example

[ennemosc]

Current example ExcelFile class (see ExcelFile class pandas 0.19.2 documentation) :

xlsx = pd.ExcelFile('path_to_file.xls)
df = pd.read_excel(xlsx, 'Sheet1')

Problem description

The closing apostrophe is missing for 'path_to_file.xls'

Expected Output

xlsx = pd.ExcelFile('path_to_file.xls')
df = pd.read_excel(xlsx, 'Sheet1')

Output of pd.show_versions()

INSTALLED VERSIONS ------------------ commit: None python: 3.5.2.final.0 python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 94 Stepping 3, GenuineIntel byteorder: little LC_ALL: None LANG: en

pandas: 0.18.1
nose: 1.3.7
pip: 9.0.1
setuptools: 27.2.0
Cython: 0.24.1
numpy: 1.11.3
scipy: 0.18.1
statsmodels: None
xarray: None
IPython: 5.1.0
sphinx: 1.5
patsy: 0.4.1
dateutil: 2.5.3
pytz: 2016.10
blosc: None
bottleneck: 1.1.0
tables: 3.2.2
numexpr: 2.6.1
matplotlib: 1.5.3
openpyxl: 2.3.2
xlrd: 1.0.0
xlwt: 1.1.2
xlsxwriter: 0.9.3
lxml: 3.6.4
bs4: 4.5.1
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: 1.0.13
pymysql: None
psycopg2: None
jinja2: 2.8
boto: 2.42.0
pandas_datareader: None

[jorisvandenbossche]

There is indeed a ' missing. Want to do a PR to fix this?

[ennemosc]

Would be my first PR, I'm perfectly fine with contributing to the pandas community :-)