[texhax] LuaLaTeX: increase font expansion in narrow columns

[Philip TAYLOR (Webmaster, Ret'd)]

Alleged sheep-stealer Paul Isambert wrote:

 > Ah, I can't resist: much simpler, and somewhat better looking (if only because it respects the integrity of the glyphs, and because we're more used to it), you can use heavy letterspacing in narrow column: grab narrow lines in post_linebreak_filter and add kerns between characters if necessary. That won't change justification, but that will relieve interword spacing a bit. I thought I'd put something like that on the wiki but apparently not, so you're welcome to share your code with the outside world :) Also, you can justify an entire paragraph with letterspacing simply by adding glues between each nodes in pre_linebreak_filter, but that's another story.

"A man who would letter-space lower-case text
  would probably steal sheep" : F W Goudy.

Philip Taylor