revert CRLF handling on statement docstring
mistake on the regex makes docstring unable to parse `(`. This was
made to handle CRLF. This commit reverts that.
@@ -29,4 +29,4 @@ ret_stmt -> "return" ret_val=(TEXT);
group_stmt -> NAME ":" %!InlineCommentIndent(stmt);
-text_stmt -> doc_string=("|" [^(\r?\n)]*) | QSTRING | TEXT ("<-" NAME)? | SHORTCUT;
+text_stmt -> doc_string=("|" [^\n]*) | QSTRING | TEXT ("<-" NAME)? | SHORTCUT;
