[Therion] Survex (loop closure) related fixes

[Martin Sluka]

I use BBEdit on MacOSX and it has all features you mentioned. 

Martin

> 14. 10. 2020 v 21:17, Tarquin Wilton-Jones via Therion <therion at speleo.sk>:
> 
> On 14/10/2020 20:08, Martin Sluka via Therion wrote:
>> What about multifile search for”P]” in text files? It is quite strange combination of characters and they are part of ASCII set. 
> 
> If you have an editor that is working in the same character set as
> Therion, that could work. Definitely worth a try.
> 
> I suspect the fault relates to character set conversion though. Such as
> an editor working in 8859-1, and Therion trying to interpret it in
> UTF-8. Most basic text editors don't let you control character set, and
> just work in the system default (Windows-1252 on English-based Windows
> systems). Even if they do, most users are not aware of what it all
> means, and just stick with the default.
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