[latexrefman] tie character

[Karl Berry]

"Tie" was certainly not invented for Texinfo. (I used the command name
@tie{} in Texinfo because using ~ was not possible, that's all.)

Knuth uses the term "tie" in The TeXbook (and I strongly suspect that he
was simply following existing typographic usage). As a result, it is
widely used throughout the TeX world. So Please do not blindly replace
with it with the (ugly, verbose, standards-committee-invented)
"non-breaking space". Yuck. -k