@tie{}: Inserting an Unbreakable Space
The @tie{} command produces a normal interword space at which
a line break may not occur. Always write it with following (empty)
braces, as usual for commands used within a paragraph. Here's an
example:
@TeX{} was written by Donald E.@tie{}Knuth.
produces:
TeX was written by Donald E. Knuth.
There are two important differences between @tie{} and
@w{ }:
@tie{} will stretch and shrink slightly
along with the normal interword spaces in the paragraph; the space
produced by @w{ } will not vary.
@tie{} allows hyphenation of the surrounding words, while
@w{ } inhibits hyphenation of those words (for TeXnical
reasons, namely that it produces an `\hbox').