Codepages bug in macros

[OXIj]

Example macro fails with unicode error on Russian UTF-8 locale.

class TimestampMacro(WikiMacroBase):
    """Inserts the current time (in seconds) into the wiki page."""

    def expand_macro(self, formatter, name, args):
        t = time.localtime()
        return tag.b(time.strftime('%c', t))

this code resolved the problem:

class TimestampMacro(WikiMacroBase):
    """Inserts the current time (in seconds) into the wiki page."""

    def expand_macro(self, formatter, name, args):
        t = time.localtime()
        return tag.b(unicode(time.strftime('%c', t), "utf-8"))

but it shold be written better (with locale checking), and some other macros may have this bug too

[cboos]

Ok, to_unicode should be used there.

[cboos]

The fix was slightly more involved and lead me to find a problem with the datefmt.format_datetime utility, see r6113.