fix code style

Author: giannisdoukas

ipython2cwl/iotypes.py

@@ -189,8 +189,8 @@ class CWLPNGPlot(CWLDumpable):
 
 
 class CWLPNGFigure(CWLDumpable):
-    """The same with :class:`~ipython2cwl.iotypes.CWLPNGPlot` but creates new figures before plotting. Use that annotation of you don't want
-    to write multiple graphs in the same image
+    """The same with :class:`~ipython2cwl.iotypes.CWLPNGPlot` but creates new figures before plotting. Use that
+    annotation of you don't want to write multiple graphs in the same image
 
     >>> import matplotlib.pyplot as plt
     >>> data = [1,2,3]