Re: [PATCH v4 1/4] git-p4: yes/no prompts should sanitize user text

> From: Ben Keene <seraphire@gmail.com>
> 
> When prompting the user interactively for direction, the tests are
> not forgiving of user input format.
> 
> For example, the first query asks for a yes/no response. If the user
> enters the full word "yes" or "no" or enters a capital "Y" the test
> will fail.
> 
> Create a new function, prompt(prompt_text) where
>   * prompt_text is the text prompt for the user
>   * returns a single character where valid return values are
>       found by inspecting prompt_text for single characters
>       surrounded by square brackets
> 
> This new function must  prompt the user for input and sanitize it by
> converting the response to a lower case string, trimming leading and
> trailing spaces, and checking if the first character is in the list
> of choices. If it is, return the first letter.
> 
> Change the current references to raw_input() to use this new function.
> 
> Since the method requires the returned text to be one of the available
> choices, remove the loop from the calling code that handles response
> verification.
> 
> Thanks-to: Denton Liu <Denton Liu>