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(texinfo)Multiple Spaces

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Multiple Spaces
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  Ordinarily, TeX collapses multiple whitespace characters (space, tab,
and newline) into a single space.  Info output, on the other hand,
preserves whitespace as you type it, except for changing a newline into
a space; this is why it is important to put two spaces at the end of
sentences in Texinfo documents.

  Occasionally, you may want to actually insert several consecutive
spaces, either for purposes of example (what your program does with
multiple spaces as input), or merely for purposes of appearance in
headings or lists.  Texinfo supports three commands: `@SPACE', `@TAB',
and `@NL', all of which insert a single space into the output.  (Here,
`@SPACE' represents an `@' character followed by a space, i.e., `@ ',
and `TAB' and `NL' represent the tab character and end-of-line, i.e.,
when `@' is the last character on a line.)

  For example,
     Spacey@ @ @ @
     example.

produces

     Spacey    example.

  Other possible uses of `@SPACE' have been subsumed by `@multitable'
(Note: Multi-column Tables).

  Do not follow any of these commands with braces.

  To produce a non-breakable space, see Note: non-breakable space.