sentence-end

sentence-end is a compiled Lisp function in `paragraphs.el'.

(sentence-end)

Return the regexp describing the end of a sentence.

This function returns either the value of the variable `sentence-end'
if it is non-nil, or the default value constructed from the
variables `sentence-end-base', `sentence-end-double-space',
`sentence-end-without-period' and `sentence-end-without-space'.

The default value specifies that in order to be recognized as the
end of a sentence, the ending period, question mark, or exclamation point
must be followed by two spaces, with perhaps some closing delimiters
in between. See Info node `(elisp)Standard Regexps'.