docs: function beforeElementClose(input, element, content) {
              // Sanity check
              verifyParameterIsDefined(input, 'input', beforeElementClose.name);
              verifyParameterIsDefined(element, 'element', beforeElementClose.name);
  
              return insertBefore(normalizeValue(input), normalizeRegExp(`<\/${normalizeValue(element)}[^\>]*>`), normalizeValue(content));
          }