[NTG-context] Math literal colon

[Hans Aberg]

> On 20 Jul 2015, at 21:34, Manuel Blanco <manuelbl at ucm.es> wrote:
> 
> I'm not sure I understand what you mean. It's true that the colon used
> in \colon differs from the one used if you input : directly by default
> (it's smaller).

Right. For some reason, your code gives the right, smaller, colon when used with luatex, but not with context. (As in the examples I gave.)