Fix CodeQL warning-severity alerts: dead checks, boxed locals and three nul...

Valery Kharseko

yesterday 504a43fc479d884085df9895900608dc5b0aca6f

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# Keep HTML checked out with LF on all platforms so javadoc doclint
# (JDK 25/26) does not treat CR (from CRLF) as part of a multi-line tag name.
*.html text eol=lf