pub fn suffix_len(&self) -> usize {
        match self {
            CommentVariant::MacroDocEqStr(_, 0) => 2,
            CommentVariant::MacroDocEqStr(_, p) => p + 1,
            CommentVariant::SlashAsteriskAsterisk
            | CommentVariant::SlashAsteriskEM
            | CommentVariant::SlashAsterisk => 2,
            CommentVariant::MacroDocEqMacro => 0,
            _ => 0,
        }
    }
Return suffix of different comment variants
doc-chunks/src/literal.rs