The previous implementation double-quoted the _args variable by escaping
each argument individually and then wrapping them all in single quotes,
producing output like: _args=''-e' 'arg1' 'arg2''
This fix concatenates all arguments into a single string first, then
escapes that string once, producing correct output like:
_args='-e arg1 arg2'
This prevents potential command injection issues when the output is
sourced in shell scripts.
Fixes#14327
ffe97db4f9