Refine Ctrl+B and Ctrl+I
Refine Ctrl+B and Ctrl+I

If there are ** or * after current cursor, just skip them or it when
hitting Ctrl+B or Ctrl+I.

Signed-off-by: Le Tan <7d16f0b5dfe3192737120adbafd0f704bf1b8474@gmail.com>

tamlok/vnote,tamlok/vnote,tamlok/vnote,tamlok/vnote,tamlok/vnote