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Spacing After Colons and Periods
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   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 acronym for
"Standard Operating Procedure".)

   Use `@.' instead of a period at the end of a sentence that ends with
a single capital letter.  Otherwise, TeX will think the letter is an
abbreviation and will not insert the correct end-of-sentence spacing.
Here is an example:

     Give it to M.I.B. and to M.E.W@.  Also, give it to R.J.C@.
     Give it to M.I.B. and to M.E.W.  Also, give it to R.J.C.

produces

     Give it to M.I.B. and to M.E.W.  Also, give it to R.J.C.
     Give it to M.I.B. and to M.E.W.  Also, give it to R.J.C.

   In the Info file output, `@.' is equivalent to a simple `.'.

   The meanings of `@:' and `@.' in Texinfo are designed to work well
with the Emacs sentence motion commands.  This made it necessary for
them to be incompatible with some other formatting systems that use

   Do not put braces after either an `@:' or an `@.' command.