An ellipsis (a line of dots) is not typeset as a string of
periods, so a special command is used for ellipsis in Texinfo. The
@bullet command is special, too. Each of these commands is
followed by a pair of braces, {}, without any whitespace
between the name of the command and the braces. (You need to use braces
with these commands because you can use them next to other text; without
the braces, the formatters would be confused. See @-Command Syntax, for further information.)