bb7459b3_Help_Syntax___Biki__What_it_looks_like
[What you type] A [[horizontal dividing line]]: this is above it ---- and this is below it. [What it looks like] 
A horizontal dividing line: this is above it... ...and this is below it. Mainly useful for disambiguation - but to be used sparsely--only when separating completely different, unrelated (groups of) meanings separating threads on Talk pages.
Help:Syntax - Biki
What it looks like