Changes in version 1.21:

'r !command' and 'w !command' ignore again the exit status of 'command'.
Bug introduced in version 1.6. (Reported by Andrew L. Moore).

Include stdbool.h instead of defining bool to fix compilation in C23.
(Reported by Alexander Jones).

The messages "Newline inserted" and "Newline appended" are now suppressed in
scripted mode (-s). (Reported by Artyom Bologov).

The chapter 'Syntax of command-line arguments' has been added to the manual.
