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ICU-22808 Correct a factually incorrect doc comment.
ICU-22714 fix zos build, use OpenXL
ICU-12564 Update copyright notice in trunk
ICU-23151 Fixed pkgdata crash with Clang-CL
ICU-12809 only .cpp files no .c in ICU library code
ICU-22621 Clang-Tidy: modernize-use-nullptr
ICU-12764 icu4c utf-8 source files, update Copyright notices.
ICU-10879 Split out OBJECTS from Makefiles into separate files
ICU-22793 Clang-Tidy: google-readability-casting
ICU-21833 remove redundant void parameter lists
ICU-12764 UTF-8 source files, update file encoding comments.
ICU-21267 stop using FALSE & TRUE macros in most library-internal headers
ICU-22793 Remove superfluous return value typecasts to UBool.