Applicable since version: 2.7.0, requires LibTextFilter
Additionally to LibTextFilter's extensive syntax one can use '$' to mark the beginning and ending of a string like so:
"oko$" will find "oko" and "kuoko" but not "okoma",
where "$oko" will find "oko" and "okoma" but not "kuoko",
thus "$oko$" will only find "oko"
and "oko" will find all of them.