Square Brackets with Tick

[Eli Zaretskii]

> From: Nigel Small <nigel at nigelsmall.com>
> Date: Sat, 22 Aug 2015 17:08:48 +0100
> 
> I am looking for clarification on an aspect of Unicode bracket pairing,
> specifically in relation to the following four characters:
> 
> 298D; 2990; o # LEFT SQUARE BRACKET WITH TICK IN TOP CORNER
> 298E; 298F; c # RIGHT SQUARE BRACKET WITH TICK IN BOTTOM CORNER
> 298F; 298E; o # LEFT SQUARE BRACKET WITH TICK IN BOTTOM CORNER
> 2990; 298D; c # RIGHT SQUARE BRACKET WITH TICK IN TOP CORNER
> 
> These stand out from all other brackets listed in BidiBrackets.txt due to an
> inconsistency in pairing. I have looked for references online on where these
> brackets are used in the wild as mathematical symbols but have been unable to
> find anything useful.
> 
> All other bracket pairs are listed as opener followed by closer, sometimes with
> several code points in between.

I think the order in the file is by the codepoint in the leftmost
column.  All the rest is just a coincidence.

But I don't speak for the Unicode Consortium, so please wait for a
definitive reply.