Re: [18/18] argv_ref speedup: reuse argv in recursion

Hi Eric,

Eric Blake writes:
> 
> Next in the series, and mission accomplished!  M4 now performs
> arbitrary-depth recursive macro expansion in linear time and space,
> regardless of whether $@ appears in isolation or inside single-byte quote
> delimiters;

Thank you very much for working through this all the way!

FWIW, there is a small typo in NEWS, s/acheive/achieve/.

Cheers,
Ralf