docs: fix typo and indentation in Quandl feed example (#9)
docs: fix typo and indentation in Quandl feed example (#9)

ColinEberhardt/d3fc,chrisprice/d3fc,ColinEberhardt/d3fc,d3fc/d3fc,ScottLogic/d3fc,d3fc/d3fc,jleft/d3-financial-components,ScottLogic/d3fc,d3fc/d3fc,ColinEberhardt/d3fc,chrisprice/d3fc,chrisprice/d3fc,d3fc/d3fc,ScottLogic/d3fc,jleft/d3-financial-components,jleft/d3-financial-components