Docs: Update is.tid (#7213)

Ref [discussion](https://talk.tiddlywiki.org/t/filter-q-is-tiddler-or-shadow-how/5888)
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twMat 2023-01-16 13:56:51 +01:00 committed by GitHub
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@ -33,6 +33,8 @@ If <<.place C>> is anything else an error message is returned. <<.from-version "
When <<.op is[missing]>> is the first operator in a [[run|Filter Run]], its output is always empty. And when <<.op is[shadow]>> comes first, it outputs only those shadow tiddlers that have been overridden. This is because the [[initial input to a run|Filter Expression]] contains only <<.em non>>-shadow tiddlers.
The <<.olink all>> operator is similar, but its scope is the whole wiki.
<<.tip "Use `has[title]` to match any tiddler title that is either a tiddler //or// a shadow tiddler.">>
<<.operator-examples "is">>
The <<.olink all>> operator is similar to <<.olink is>>, but its scope is the whole wiki.
<<.operator-examples "is">>