only add ':' to legend if x value formatter returns a value
updated check for empty string
regenerated
Add test case which confirms regression reported in https://issuenav.googleplex.com/issues/dygraphs/336
Merge pull request #153 from jzgg/master

only append ':' to html when x legend text is not empty
Fix bug 336. parseFloat(null) == NaN. Delightful.
Merge github.com:danvk/dygraphs
Add assertion that gets all the drawn lines.
Explain the role of NaN in connectSeparatedPoints.
Properly draw separated points.
Document the role of makeNextPointStep.
connectSeparatedPoints is working. This has also improved
tests/independent-series.html, which was broken with the performance
enhancement, but that's still broken.
Moving the new missing-points tests to their own test case.
Add missing_points.js to the bunch (as part of prior move .. oooops)
Mild code reduction by eliminating duplication
added support for labelsKMG2 to handle very small numbers (mili, micro, nano...)
Add failure count to top of file.
make fork ribbon appear above everything else.
Merge branch 'master' of github.com:danvk/dygraphs
Introduce Dygraph.createIterator, and use it to simplify the code in drawTrivialLine and drawNonTrivialLine. Lots o' tests.