ref. http://note.harajuku-tech.org/rst2pdfpdf
$ vi /home/hdknr/.ve/emirps/lib/python2.5/site-packages/reportlab/platypus/paragraph.py def _justifyDrawParaLineX( tx, offset, line, last=0):
setXPos(tx,offset)
extraSpace = line.extraSpace
# simple = last or abs(extraSpace)<=1e-8 or line.lineBreak # HDKNR
simple = last or abs(extraSpace)<=1e-8 or getattr(line, 'lineBreak', False)
if not simple:
nSpaces = line.wordCount+sum([_nbspCount(w.text) for w in line.words if not hasattr(w,'cbDefn')])-1
simple = not nSpaces
if not simple:
tx.setWordSpace(extraSpace / float(nSpaces))
_putFragLine(offset, tx, line)
tx.setWordSpace(0)
else:
_putFragLine(offset, tx, line) #no space modification
setXPos(tx,-offset)