init_notebook_mode() flushes the math in markdown to left

[r-parhizkar]

In Jupyter notebook, once I call init_notebook_mode() and save and close the notebook and reopen it, all the math formula (in markdown) which were centered before, are flushed to the left. I am using python 2.7, plotly version 1.9.10 and Jupyter 4.1.0!

Here is an example:
Cell 1:

import plotly
print plotly.__version__
plotly.offline.init_notebook_mode()

Cell 2:

$$x = y$$

[jackparmer]

Duplicated of #445