[DOC BLD FIX] Correct reST field lists in docstrings

Most common format for documenting arguments is reST field, the incorrect
docstring will cause a Sphinx warning to be generated and caused the documentation
to be improperly rendered.

[1] http://sphinx-doc.org/domains.html#info-field-lists

Change-Id: I031cc3ca202b140b6ff6d9fadc46e0765ee2f36c
2 files changed