bash: update to 5.3 patch level 20

2026-09-16T15:53:00Z

- Accommodate macOS dynamic pipe sizing, avoiding hangs. - Modify the readline redisplay code to use a buffer offset instead of the physical prompt length in a multibyte locale to determine whether to reprint the prompt from column 0 because the cursor is before the last invisible character in the prompt string. - Fix readline crash with a prompt that exceeds 256 wrapped lines. Fix readline redisplay code to print the entire prompt if the first few characters are identical but part of a terminal escape sequence and the prompt needs to be redrawn. - Work around systems including bytes between 128 and 255 in the isalpha(3) set, which causes bash to potentially include them in identifier names. - If readline handles a SIGWINCH and updates its idea of the screen dimensions, it needs to recompute the columns where the prompt wraps lines every time, not just when the screen width decreases. Signed-off-by: Wei-Ting Yang

packages/utils/bash/patches/018-bash_5.3_patch_19.patch, branch master

bash: update to 5.3 patch level 20