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(groff)Sentences

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Sentences
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   Although it is often debated, some typesetting rules say there
should be different amounts of space after various punctuation marks.
For example, the `Chicago typsetting manual' says that a period at the
end of a sentence should have twice as much space following it as would
a comma or a period as part of an abbreviation.

   `gtroff' does this by flagging certain characters (normally `!',
`?', and `.') as "end of sentence" characters.  When `gtroff'
encounters one of these characters at the end of a line, it appends a
normal space followed by a "sentence space" in the formatted output.
(This justifies one of the conventions mentioned in Note: Input
Conventions.)

   In addition, the following characters or glyphs are treated
transparently while handling end of sentence characters: `"', `'', `)',
`]', `*', `dg', and `rq'.

   See the `cflags' request in Note: Using Symbols, for more details.

   To prevent the insertion of extra space after an end of sentence
character (at the end of a line), append `\&'.