Duplicate argument error thrown when using 'at_least_one'

[linkm-ampere]

using the example:

program.add_argument("--input_files")
.nargs(argparse::nargs_pattern::at_least_one);

---

Duplicate argument --input_files

given that I specify "at least one" then I presume that 1 or more are a given. But currently it's required have "append" added as well.

[wanjiadenghuo111]

亲，来信已经收到！祝你快乐！