mixed-indentation does not catch indent errors on multiline array/object

[maximecharron]

Steps to reproduce

1. Have a mix of spaces and tabs in a multiline object/array

// Spaces everywhere for the indentation
foo = {
    'bar': [
        'foobar',
		'barfoo', // Tabs on this line instead of spaces
    ]
}

2. Run pylint
3. Notice it doesn't catch the mixed-indentation

Current behavior

Pylint doesn't catch the mixed indentation (see code snippet in steps to reproduce)

Expected behavior

Pylint should catch the mixed indentation and report an error

pylint --version output

Using config file foo\.pylintrc
__main__.py 1.9.2,
astroid 1.6.5
Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 17:00:18) [MSC v.1900 64 bit (AMD64)]

[PCManticore]

Thanks for the report.

[Pierre-Sassoulas]

mixed-indentation has been removed in #3578 , it is no longer useful since TabError is included directly in python3