The GNU project's Bourne Again
SHell (Bash) has released version 5.3, with some significant new
features, including some from the associated
Readline 8.3 release, which provides
command-line editing and other features for Bash and lots of other
programs. Bash 5.3 has a "new form of command substitution that executes the command in
the current shell execution context", pathname-completion sorting
will be handled based on the GLOBSORT shell variable, generated
completions can go to a shell variable instead of to stdout, the source
code has been updated to C23, and more. Meanwhile:

Readline has new features as well. There is a new option that allows case-insensitive searching, a new command that executes a named readline command, and a new command that exports possible word completions in a specified format for consumption by another process.

https://lwn.net/Articles/1029079/
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