On 2016-10-14 Fri 12:02 GMT-0800, Eli Zaretskii <eliz@gnu.org> wrote:

>> From: Hong Xu <hong@topbug.net>
>> Date: Fri, 14 Oct 2016 11:24:52 -0700
>> 
>> Currently url-hexify-string has an optional argument allowed-chars,
>> which is a long vector. However, it is more natural to specify a list of
>> characters. Internally, the default value of allowed-chars is specified
>> by converting a list of chars to such a vector by using an internal
>> function url--allow-chars. I would like to suggest to document
>> url--allow-chars for external use, thus we can improve the interface of
>> the url-hexify-string function.
>> 
>> I can draft the document change, if you agree with me.
>
> Isn't it better to teach url-hexify-string to accept lists as well?

The patch is attached.

Make url-hexify-string accept a list of allowed chars.

	* url-util.el (url-hexify-string): Accept a list of allowed chars.
	* url.texi (URI Encoding): Update url-hexify-string doc and index improvements.