dash-backslash-newline-is-delim.css:2:19-20: error: GTK_CSS_PARSER_ERROR_SYNTAX dash-backslash-newline-is-delim.css:2:3-3:1: error: GTK_CSS_PARSER_WARNING_SYNTAX dash-backslash-newline-is-delim.css:1:3-3:1: error: GTK_CSS_PARSER_WARNING_SYNTAX