[NTG-context] compatibility with AucTeX (was: result saved in file: ./file.pdf)

On Mon, Aug 16 2021, Peter Münster via ntg-context wrote:

that breaks the error-checker of AucTeX.

No, sorry. It's something else, that breaks it: lines, that begin like "4:5: [glue]<1: ...". Such lines look like errors to AucTeX. What does "4:5" mean? Is this going to change? TIA, -- Peter