Not Ending a Sentence
---------------------

  Depending on whether a period or exclamation point or question mark is
inside or at the end of a sentence, less or more space is inserted after
a period in a typeset manual.  Since it is not always possible for
Texinfo to determine when a period ends a sentence and when it is used
in an abbreviation, special commands are needed in some circumstances.
(Usually, Texinfo can guess how to handle periods, so you do not need to
use the special commands; you just enter a period as you would if you
were using a typewriter, which means you put two spaces after the
period, question mark, or exclamation mark that ends a sentence.)

  Use the `@:' command after a period, question mark, exclamation mark,
or colon that should not be followed by extra space.  For example, use
`@:' after periods that end abbreviations which are not at the ends of
sentences.  `@:' has no effect on the Info file output.

  For example,

     The s.o.p.@: has three parts ...
     The s.o.p. has three parts ...

produces

     The s.o.p. has three parts ...
     The s.o.p. has three parts ...

`@:' has no effect on the Info output.  (`s.o.p.' is an abbreviation
for "Standard Operating Procedure".)

  Do not put braces after `@:'.