[Therion] Survex (loop closure) related fixes

[Tarquin Wilton-Jones]

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.