Fix syntax error

[mdboom]

Using \u, even in a raw string, is a syntax error when unicode_literals is on.

[WeatherGod]

When did this become a syntax error?

[mdboom]

Since the introduction of from __future__ import unicode_literals (Python
2.6, I believe). It is not a syntax error on Python 3.

On Wed, Aug 26, 2015 at 1:12 PM Benjamin Root notifications@github.com
wrote:

When did this become a syntax error?

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#4994 (comment)
.

[mdboom]

And I should clarify -- \u is only a syntax error if it isn't followed by 4 hexadecimal digits...

[WeatherGod]

ok, I'll rephrase... why haven't we noticed this?

[mdboom]

This file was introduced on 2015-08-10, and the only symptom is that the file doesn't get installed, along with this message flashing by:

byte-compiling build/bdist.linux-x86_64/egg/matplotlib/tests/test_texmanager.py to test_texmanager.pyc
  File "build/bdist.linux-x86_64/egg/matplotlib/tests/test_texmanager.py", line 17
    plt.rcParams['text.latex.preamble'] = [r'\usepackage{txfonts}']
SyntaxError: (unicode error) 'rawunicodeescape' codec can't decode bytes in position 0-1: truncated \uXXXX

It means this test has never actually run.

[tacaswell]

This should also be added to the whitelist of tests in __init__.py

[tacaswell]

Added the test and merged locally.