Convert lines to wiki headers

Reformat these lines by wrapping them in ==== ==== pairs. For example, change "$fa - minimum angle" to "==== $fa - minimum angle ====".  Leave a blank line between each row.
$fa - minimum angle
$fs - minimum size
$fn - number of fragments
$t - animation step
$vpr - viewport rotation angles in degrees
$vpt - viewport translation
$vpd - viewport camera distance
$children - number of module children