@w{text}: Prevent Line Breaks@w{text} outputs text and prohibits line breaks
within text.
  
You can use the @w command to prevent TeX from automatically
hyphenating a long name or phrase that happens to fall near the end of a
line.  For example:
     You can copy GNU software from @w{@samp{ftp.gnu.org}}.
     
produces
You can copy GNU software from ftp.gnu.org. 
  You can also use @w to produce a non-breakable space, fixed at
the width of a normal interword space:
     @w{ } @w{ } @w{ } indentation.
     
produces:
           indentation.
     
  The space from @w{ }, as well as being non-breakable, also
will not stretch or shrink.  Sometimes that is what you want, for
instance if you're doing some manual indenting.  However, usually you
want a normal interword space that does stretch and shrink (in the
printed output); see the @tie command in the next section.