userdiff: extend Bash pattern to cover more shell function forms

2025-05-16T18:52:41Z

The previous function regex required explicit matching of function bodies using `{`, `(`, `((`, or `[[`, which caused several issues: - It failed to capture valid functions where `{` was on the next line due to line continuation (`\`). - It did not recognize functions with single command body, such as `x () echo hello`. Replacing the function body matching logic with `.*$`, ensures that everything on the function definition line is captured. Additionally, the word regex is refined to better recognize shell syntax, including additional parameter expansion operators and command-line options. Signed-off-by: Moumita Dhar Acked-by: Johannes Sixt Signed-off-by: Junio C Hamano

git/t/t4018/bash-posix-style-single-command-function, branch main

userdiff: extend Bash pattern to cover more shell function forms