Fix multi line docstring: one blank line required between summary line and description. https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings
Fix multi line docstring: one blank line required between summary line and description. https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings

plotly/dash,plotly/dash,plotly/dash,plotly/dash,plotly/dash