How to properly escape special filter syntax chars in filter operator parameters?

@vuk when setting a variable to a string as in your example you can use define, procedure pragma but also $set, $vars and the best $let

\procedure tiddler-title() [[JeremyRuston]]

and use `<tiddler-title>` in your filters

or
<$let tiddler-title="[[JeremyRuston]]">

and use `<tiddler-title>` in your filters

</$let>

However;

There are otherways to populate fields, lists and handle titles that handle the use of [[name with spaces]] namewithoutspaces including but not limited to the listops action widget.