scipy/scipy — pull request #4003 by Dapid (2014-09-18 18:20:47+00:00)
Title: ENH: using python's warnings instead of prints in fitpack.

When fitpack detects a recoverable problem, it will signal it with
a RuntimeWarning instead of printing to stdout. This way the output
can be programatically silenced or made exceptions.

There is one failure on Travis, but I don't see what has failed.