Parce que c'est quand même pas trop évident, je garde ça de côté.
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Yes, the lld macro has to be escaped. In this case you can try the workaround mentioned by Aleksandrs Saveljevs - adding space (or some other symbol) at the end of context:

{Template Virt VMware Guest:vmware.vm.vfs.fs.size[{$URL},{HOST.HOST},{#FSNAME},free].avg(180)}<{$LOW_SPACE_LIMIT:"{#FSNAME}$"}

and macro {$LOW_SPACE_LIMIT:"C:\$"}
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