[Webkit-unassigned] [Bug 281919] New: WebCore::DecodedHTMLEntity::span() should use std::span::first()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=281919

            Bug ID: 281919
           Summary: WebCore::DecodedHTMLEntity::span() should use
                    std::span::first()
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ddkilzer at webkit.org

WebCore::DecodedHTMLEntity::span() should use std::span::first().

This code currently avoids bounds checking of `m_characters` when creating std::span:

```
    constexpr std::span<const UChar> span() const { return { m_characters.data(), m_length }; }
```

Found by std::span clang static analysis checker under development.

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