Re: [PATCH v3 0/8] enhance "string_list" code and test

> Changes since v2:
> 
> 1. [PATCH v3 1/8]: improve the commit message to explain that we would
>    handle a warning in the later commits.
> 2. [PATCH v3 2/8] and [PATCH v2 3/8]: improve the commit message to add
>    the history background.
> 3. [PATCH v3 4/8]: improve the commit message to show why the current
>    bianry search algorithm introduces the sign warning and how to change
>    it to fix the sign warning.
> 4. [PATCH v3 5/8] - [PATCH v3 8/8]: remove list into test helper instead
>    of test itself for reducing the shared state.
> 5. [PATCH v3 8/8]: improve the commit message to say why we can't delete
>    "test-tool string_list" totally.