EPUB writer: Fix section numbering.

Previously the numbering restarted from 1 in each chapter
(with `--number-sections`), though the numbers in the table
of contents were correct.

Note that this fix is a bit hackish and possibly fragile:
if the rendering of section numbers in HTML changes in the
future, it may break.  But it works, without needing
changes in other modules.

0 files changed, 0 insertions, 0 deletions