Missing docstrings for public/exported symbols

This is a tracking issue for public/exported symbols missing docstrings that were identified with the help of #52723. Please check them off as they get fixed and link the corresponding PRs (which should also enable a @test isempty(Docs.undocumented_names(ThisModule)) regression test).

Note that this is separate from the issue of whether those docstrings are included in the manual (#19529).

• Core: AtomicMemoryRef, ConcurrencyViolationError, Exception, GenericMemoryRef, GlobalRef, IO, LineNumberNode, Method, SegmentationFault, TypeVar, arrayref, arrayset, arraysize, const_arrayref

Base and public/exported submodules thereof:

• Base: BufferStream, CanonicalIndexError, CapturedException, Filesystem, IOServer, InvalidStateException, PipeEndpoint, TTY
• Base.Sys: CPU_NAME, JIT, cpu_info, cpu_summary (#52777)
• Base.Filesystem:
  • File, Filesystem, cptree, futime, rename, sendfile, unlink
  • JL_O_APPEND, JL_O_ASYNC, JL_O_CLOEXEC, JL_O_CREAT, JL_O_DIRECT, JL_O_DIRECTORY, JL_O_DSYNC, JL_O_EXCL, JL_O_FSYNC, JL_O_LARGEFILE, JL_O_NDELAY, JL_O_NOATIME, JL_O_NOCTTY, JL_O_NOFOLLOW, JL_O_NONBLOCK, JL_O_PATH, JL_O_RANDOM, JL_O_RDONLY, JL_O_RDWR, JL_O_RSYNC, JL_O_SEQUENTIAL, JL_O_SHORT_LIVED, JL_O_SYNC, JL_O_TEMPORARY, JL_O_TMPFILE, JL_O_TRUNC, JL_O_WRONLY, S_IRGRP, S_IROTH, S_IRUSR, S_IRWXG, S_IRWXO, S_IRWXU, S_IWGRP, S_IWOTH, S_IWUSR, S_IXGRP, S_IXOTH, S_IXUSR (#53247)
• Base.Docs: @var
• Base.Broadcast: dotview (#62026)
• Base.Order: DirectOrdering, ForwardOrdering, Order, ordtype (#62025)
• Base.Sort: Algorithm, SMALL_ALGORITHM (#53807), SMALL_THRESHOLD, Sort (#62026)

Standard Library:

• Libdl: Libdl (#52825)
• TOML: TOML (#52834)
• Artifacts: Artifacts (#52913)
• Dates: adjust (#52914)
• Unicode: Unicode (#52761)
• Markdown: @doc_str, @md_str, html, latex (#52733 and #52606)
• Serialization: AbstractSerializer, Serializer (#61310)
• REPL: AbstractREPL, BasicREPL, LineEditREPL, StreamREPL (#52876)
• Printf: Printf (#52791)
• InteractiveUtils: InteractiveUtils (https://github.com/JuliaLang/julia/pull/53206)
• Profile: Allocs (#53559)
• LinearAlgebra: ColumnNorm, LAPACKException, NoPivot, RankDeficientException, RowMaximum, RowNonZero, copy_transpose! (#52934)
• Logging: AboveMaxLevel, BelowMinLevel
• FileWatching: FDWatcher, FileMonitor, FolderMonitor, PollingFileWatcher
• SparseArrays: fkeep! (https://github.com/JuliaSparse/SparseArrays.jl/pull/503)
• Tar: Tar (https://github.com/JuliaIO/Tar.jl/pull/173)
• Pkg: PKGMODE_MANIFEST, PKGMODE_PROJECT, PRESERVE_ALL, PRESERVE_ALL_INSTALLED, PRESERVE_DIRECT, PRESERVE_NONE, PRESERVE_SEMVER, PRESERVE_TIERED, PRESERVE_TIERED_INSTALLED, Pkg, PreserveLevel, Registry, UPLEVEL_MAJOR, UPLEVEL_MINOR, UPLEVEL_PATCH