Pattern to locate the end of a sentence. The following word will be checked to start with a capital letter. If not then it is highlighted with SpellCap hl-SpellCap (unless the word is also badly spelled). When this check is not wanted make this option empty. Only used when 'spell' is set. Be careful with special characters, see option-backslash about including spaces and backslashes. To set this option automatically depending on the language, see set-spc-auto.

(default "[.?!]_[])'" \t]+")

not available when compiled without the +syntax feature