[Demexp-dev] Bug: classification system (a:, ab: etc.) does not match alphabetical order

[Felix HENRY]

Hi all,

a little bug: the "fake hierarchical" classification system of tags
has a problem. The system consists in using for instance:
a:education
aa:maths
ab:physics
b:ecology

etc.

However, it seems that the ':' character is after 'a' 'b' etc.
because I get the following order:
aa:maths
ab:physics
a:education
b:ecology

  Felix