Re: diagnostics: prefer "…" to "..." if the locale supports it

[Hans Åberg]

> On 11 Oct 2019, at 22:14, Paul Eggert <address@hidden> wrote:
> 
>>     diagnostics: prefer "…" to "..." if the locale supports it
> 
> Is this really a win? I normally used fixed-width fonts, and on my platform a 
> string like "ABC…DEF" is all-too-easily confused with "ABC_DEF" if there are 
> no underscores in the neighborhood. (I am using Fedora 30 with default fonts.)

Curiously, in Lucida Grande, the two looks identical.

> For what it's worth, the Wikipedia manual of style 
> <https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style#Ellipses> says, 
> "Wikipedia's style for an ellipsis is three unspaced dots (...); do not use 
> the precomposed ellipsis character (…) or three dots separated by spaces (. . 
> .)." Although Bison is not bound by any such style guide, I've found the 
> Wikipedia style manual to be a good source for advice when trying to write 
> clear documentation that is readable on the web.

The WP style rules are somewhat contradictory, for example they do the opposite 
with en-dashes, using the Unicode character U+2013 instead of ASCII, and also 
in situations where traditionally it is not used. Traditionally, headers are in 
sans-serif if you bother and the body in serif, but they do the opposite.