Format seconds as m'ss" string rounded to the nearest second.
abjad> durtools.seconds_to_clock_string(117)
'1\'57"'
Set escape = True to escape " seconds indicator. Useful when formatting ouput as LilyPond markup.
abjad> t = Note(0, (1, 4))
abjad> durtools.seconds_to_clock_string(117, escape = True)
'1\'57\\"'
abjad> clock_string = _
abjad> t.markup.up.append('"%s"' % clock_string)
abjad> print t.format
c'4 ^ \markup { "1'57\"" }