slurp-backward-fully

DEPRECATED: We recommend instead [[slurp-backward-fully-into]] for more control. Returns `zloc` with all left sibling nodes of nearest eligible sequnece slurped into that sequence else `zloc`. - `1 [2 3 [|4] 5 6] => 1 [[2 3 |4] 5 6]` If located at an empty seq will ultimately slurp into that empty seq and locate to the first slurped node. - `1 [[2 3 |[]] 4 5] => 1 [[[|2 3]] 4 5]`