ExcelFile has non existent argument "kind"  in the docstring
```
class ExcelFile(object):
    """
    Class for parsing tabular excel sheets into DataFrame objects.
    Uses xlrd for parsing .xls files or openpyxl for .xlsx files.
    See ExcelFile.parse for more documentation

    Parameters
    ----------
    path : string or file-like object
        Path to xls file
    kind : {'xls', 'xlsx', None}, default None
    """
    def __init__(self, path_or_buf):
```
