Fix narrowing wording in handbook - #3622
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Pull request overview
Updates the Narrowing handbook page to clarify how TypeScript interprets boolean negation (!) in truthiness narrowing, specifically describing how negated branches exclude truthy types.
Changes:
- Rewords a single sentence to explicitly state that
!negation filters out truthy types in the negated branch.
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Fixes #3611
One sentence wording fix in the Narrowing handbook page: clarifies that Boolean negations with ! filter out truthy types in negated branches.
Documentation-only change.