code: function verifyListSpacing(properties) {
              const length = properties.length;
  
              for (let i = 0; i < length; i++) {
                  verifySpacing(properties[i], singleLineOptions);
              }
          }
docs: Verifies spacing of each property in a list.
  @param  {ASTNode[]} properties List of Property AST nodes.
  @returns {void}