[NTG-context] ctxlua percentage format escape

Hi, I was trying to use a quick calculation like the new mathfun in lmtx for an older mkiv document. MWE from the wiki: https://wiki.contextgarden.net/Programming_in_LuaTeX#Examples \starttext $\pi = \ctxlua{context("\%.6f", math.pi)}$ \stoptext But that gives an error (actually for both lmtx and mkiv): token call, syntax: [ctxlua]:1: invalid escape sequence near '"\%' Whereas \starttext $\pi = \startluacode context("%.6f", math.pi) \stopluacode$ \stoptext Works fine as expected. Is there a way to escape the percentage sign in ctxlua as a format value? Adam