text contrib module docs errors

[aaronmarkham]

Description

Sphinx is throwing errors on the contrib.text.embedding and contrib.text.vocab modules.

Error

/home/ubuntu/incubator-mxnet/python/mxnet/contrib/text/embedding.py:docstring of mxnet.contrib.text.embedding.GloVe:40: SEVERE: Unexpected section title.

Properties
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/home/ubuntu/incubator-mxnet/python/mxnet/contrib/text/embedding.py:docstring of mxnet.contrib.text.embedding.FastText:54: SEVERE: Unexpected section title.

Properties
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/home/ubuntu/incubator-mxnet/python/mxnet/contrib/text/embedding.py:docstring of mxnet.contrib.text.embedding.CustomEmbedding:31: SEVERE: Unexpected section title.

Properties
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/home/ubuntu/incubator-mxnet/python/mxnet/contrib/text/embedding.py:docstring of mxnet.contrib.text.embedding.CompositeEmbedding:18: SEVERE: Unexpected section title.

Properties
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/home/ubuntu/incubator-mxnet/python/mxnet/contrib/text/vocab.py:docstring of mxnet.contrib.text.vocab.Vocabulary:34: SEVERE: Unexpected section title.

[andrewfayres]

@mxnet-label-bot add [doc]

[aaronmarkham]

@mxnet-label-bot [good first issue]

[andrewfayres]

@mxnet-label-bot [Good First Issue]