missing HexString documentation

[Steven Schveighoffer]

On 2/7/18 10:41 AM, Seb wrote:
> On Wednesday, 7 February 2018 at 15:25:05 UTC, Steven Schveighoffer wrote:
>> On 2/7/18 9:59 AM, Ralph Doncaster wrote:
>>> It is mentioned in the literals section, but not documented:
>>> https://dlang.org/spec/lex.html#string_literals
>>>
>>>  From reading forum posts I managed to figure out that HexStrings are 
>>> prefixed with an x.  i.e. x"deadbeef"
>>>
>>
>> Good catch! Even the grammar says nothing about what it is, except it 
>> has HexString as a possible literal.
>>
>> Can you file an issue? https://issues.dlang.org
>>
> 
> They are deprecated:
> 
> https://dlang.org/changelog/pending.html#hexstrings
> https://dlang.org/deprecate.html#Hexstring%20literals

Wow, that's... a little superfluous.

So we support this:

"\xde\xad\xbe\xef"

but not this?

x"deadbeef"

Seems like the same code you would need to parse the first is reusable 
for the second, no? I don't see why this deprecation was necessary, and 
now we have more library/template baggage.

-Steve