Re: Making a non-ASCII space character visible

[Marcin Borkowski]

On 2018-06-16, at 23:37, Will Parsons <varro@nodomain.invalid> wrote:

> On Saturday, 16 Jun 2018  4:15 PM -0400, Will Parsons wrote:
>> I have a desire to use the Unicode character A007 (FIGURE SPACE) in a
>> document and to be able to distinguish it visually from a regular ASCII
>> space.  This seems to be already done in the case of 00A0 (NO-BREAK
>> SPACE) which appears as an underscore with a distinctive face.
>>
>> It *looks* like I should be able to do this via the customization
>> option "Whitespace Display Mappings", but no matter what I do,
>> attempting to "Apply" the changes results in an error message, "This
>> field should contain a single character".  (This message occurs even
>> if I try to change one of the display characters of an existing entry
>> in the list and apply.)
>>
>> Feeling desperate, I copied the existing value of
>> whitespace-display-mappings directly into my custom.el file, and
>> manually added a new entry for A007 (8199) on the model of the
>> existing entry for 00A0 (160), but this seems to have no effect on the
>> display.
>>
>> (This is using Emacs 25, in case it should make a difference.)
>
> Correction:  FIGURE SPACE is actually 0x2007, not 0xA007, but that's
> simply a mistake in my post, not the actual code.  (Sorry for not
> being more careful.)

How about good old

M-s h r (highlight-regexp)?

Hth,

-- 
Marcin Borkowski
http://mbork.pl