chore: release 2.18.0

[github-actions]

🤖 I have created a release beep boop

2.18.0 (2026-02-12)

Features

• aclocal,automake: support versioned 1.17 executables (94bbb3a)
• dive: add 3rd party fallback completion loader (f817cca)
• mago: add 3rd party fallback completion loader (97c4c49)
• pnpm: add 3rd party fallback completion loader (44804ae)
• pydoc: support versioned 3.13..15 executables (bd60b26)
• python,pyvenv: support versioned 3.14 and .15 executables (72a2e47)
• release-plz: add 3rd party fallback completion loader (c3c4066)
• ssh-keygen: -M arg completion (b13bf99)
• ssh-keygen: -Z argument completion (c763d52)
• ssh-keygen: more option arg completions (1303f8a)
• ssh-keygen: update -t arg completions (4269a90)
• ssh-keygen: update -Y arg completions (a73bcaf)
• sudo-rs,sudo.ws: alias to sudo (084cc68)
• sudo: more option argument (non-)completions (379ec2d)
• sudo: more option argument (non-)completions (216135e)
• syncthing: add 3rd party fallback completion loader (bc5dfff)
• tmux: complete src/target session arguments (18b6da4)
• tmux: complete target-session arguments (ced59c3)
• waydroid: add 3rd party fallback completion loader (acc800f)

Bug Fixes

• _comp_compgen: clear the variable when no completions are generated (c07bd66)
• _comp_complete_service: fix init-script-action parsing (#1499) (91e075a)
• _comp_load: deprecate unsuffixed "completions/<cmd>" w/o ".bash" (06910da)
• _comp_load: drop support for "_<cmd>" (f245356)
• apt-get,ebtables,iptables,mplayer,service: avoid | and | in sed (ed64c30)
• apt-get,gpg{,2},ipmitool,screen: avoid \t, \r, \w in POSIX sed (da40e7a)
• ccache: fix a wrong AWK condition (c300c0f)
• cd: Complete from . on empty CDPATH entry (#1527) (6f1eba6)
• cd: fix cdable_vars overwritten by another generator (225b8ab)
• cd: fix cdable_vars overwritten by another generator (24bd420)
• cd: work around bash-4.2 nounset (45d1c93)
• fbgs,fbi: add mandatory semicolons before "}" in POSIX sed (288e77e)
• fix non-POSIX sed expressions (e999091)
• gnokii: use double \ in [...] for POSIX.1-2024 recommendation (ab0483a)
• interdiff: move to fallback for the upstream completion (11987a4)
• invoke-rc.d: avoid using non-POSIX | in sed (db928dd)
• invoke-rc.d: fix a bug of generating existing words (dfb903b)
• ipstables,ebtables: fix filtering of chain names (213a1d2)
• lilo,mutt: remove unnecessary escaping " in sed regexp (b8f6ef2)
• lintian: fix variable leaks (e0e916a)
• lintian: use compgen -X instead of sed with non-POSIX &lt;&gt; (b6f34ef)
• miscellaneous fixes after separation of directories (c4a8fd0)
• shellcheck: avoid non-POSIX &gt; in sed regular expressions (c0b3620)
• xrandr: remove wrong \ from character range (cc75da2)

Performance Improvements

• _comp_compgen_filedir_xspec: avoid double negation !(!(...)) (b24305d)
• filedir_xspec: avoid double negation !(!(...)) in extglob (c53259a)

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This PR was generated with Release Please. See documentation.

[scop]

Sigh, googleapis/release-please#2613

[yedayak]

Before merging this, I think there should be a note at the beginning mentioning the reordering of the completion directories, since it will probably affect distributions.