My Emacs configuration https://git.cjennings.net/dotemacs/atom?h=main 2026-05-10T19:13:56+00:00 2026-05-10T19:13:56+00:00 Craig Jennings c@cjennings.net 2026-05-10T19:13:56+00:00 urn:sha1:f1e8f0898244bd2d834baf7541d10e5eff351d34 Phase 2.2 of utility-consolidation. The "quote only when shell-unsafe characters appear, otherwise leave the argument readable" pattern was trapped in dev-fkeys as `cj/--f6-shell-quote-argument' alongside its `cj/--f6-shell-safe-argument-regexp' constant. Lift both into system-lib.el under their generic names; the F6 branding hid that the same shape is useful for any generated compile/test command where the surrounding line ends up in a *compilation* buffer the user reads. Six Normal/Boundary tests cover safe inputs that pass through unchanged (alphanumeric paths, test regexes, `FLAG=value', `host:port'), unsafe inputs that get quoted (spaces, `$', `;', `&', backticks, `*'), and the empty-string boundary. Migrate dev-fkeys's five callers to the new name and add `(require \='system-lib)' per the Phase 2 exit criterion.