pub fn about(self) -> Self {
        build!(
            self,
            about,
            "\nReads lines from standard input and groups them by common substrings. By default, \
            prints the resulting groups to standard output."
        )
    }
/// Adds the overall about message.
Adds the overall about message.
Adds the overall about message .
pub fn about(self) -> Self {
        build!(
            self,
            about,
            "\nReads lines from standard input and groups them by common substrings. By default, \
            prints the resulting groups to standard output."
        )
    }
pub fn about ( self ) -> Self { build ! ( self about " \n \
 " ) }
Adds the overall about message.
Adds the overall about message .
self
self