MrRio/jsPDF — pull request #167 by spenthil (2014-01-19 20:35:29+00:00)
Title: Allow changing line height

like this:

pdf = new jsPDF("portrait", "in", "letter");
pdf.lineHeightProportion = 2;

http://stackoverflow.com/questions/18522323/jspdf-adjust-the-text-line-spacing