[Zope] Calendar tag 0.9.5 buglet

A very minor misfeature to fix for the next release. line 246 of CalendarTag.py has s = s + '<font color="%(leftfgcolor)s">' which renders literally since leftfgcolor is not in the namespace. It makes all the month names in the year view a ghastly green on my machine. Change it to s = s + '<font color="%s">' % v['leftfgcolor'] and it works better. Interesting that the %(foo)s syntax can hide bugs this way....??