[m-rev.] for review: uint_to_lc_hex_string

[Julien Fischer]

On Fri, 22 Jan 2021, Zoltan Somogyi wrote:

> For review by Julien, since it is related to his recent change.
>
> Add uint{64,}_to_lc_hex_string.
> 
> library/string.m:
>     We long had uint_to_hex_string and uint_to_uc_hex_string. Add
>     uint_to_lc_hex_string as well, and make uint_to_hex_string call it.
>     This way, users don't have to remember which of the upper and lower
>     case versions is defined, and which is missing.
>
>     Do the same for the 64 bit version.
> 
> NEWS:
>     Announce the new functions.
> 
> library/string.format.m:
>     Call the new functions.

That's fine.

Julien.