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Re: Fill column indicator functionality

From: Óscar Fuentes
Subject: Re: Fill column indicator functionality
Date: Sat, 06 Apr 2019 00:20:29 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.90 (gnu/linux)

Ergus <address@hidden> writes:

>>>>> If I set a different value to display-fill-column-indicator with
>>>>> customize-variable and save; the display should be updated to use the
>>>>> new value right? (display the indicator or hide it)
>>>>> I have never used customize-variable, so maybe that's not the expected
>>>>> behavior.
>>>>After changing the value, you need to click "STATE" and select "Set
>>>>for current session".  Did you do that?
>>> Yes, I did, and there is not change.
>>I have a patch from some days ago applied here, sorry if this is
>>outdated, but I see something suspicious. After M-x customize-variable
>>display-fill-column-indicator-character :
>>Hide display-fill-column-indicator-character: nil
>>    State : STANDARD. (mismatch)
>>   Character to draw the indicator when ‘display-fill-column-indicator’ is 
>> non-n
>>That "nil" and "mismatch" are not right. This is the definition of the
>>variable in xdisp.c:
>>  DEFVAR_LISP ("display-fill-column-indicator-character", 
>> Vdisplay_fill_column_indicator_character,
>>    doc: /* Character to draw the indicator when 
>> `display-fill-column-indicator' is non-nil.
>>The default is U+2502 but a good alternative is (ascii 124) if
>>the font in fill-column-face does not support Unicode characters.  */);
>>  Vdisplay_fill_column_indicator_character = Qnil;
>>  DEFSYM (Qdisplay_fill_column_indicator_character, 
>> "display-fill-column-indicator-character");
>>  Fmake_variable_buffer_local (Qdisplay_fill_column_indicator_character);
>>I know next to nothing about those macros, but look suspicious.
> Yes, I observe a similar behavior. Look the attachment. The value is
> nil but the indicator is shown.

Oh, you are talking about display-fill-column-indicator and I about
display-fill-column-indicator-character. Sorry for the confusion, but my
observation points to a problem that may be related to what you are

BTW, here display-fill-column-indicator is not customizable.

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