private static SourceException noBits(final CommonStmtCtx stmt) {
/*
- * https://tools.ietf.org/html/rfc7950#section-9.7.4:
+ * https://www.rfc-editor.org/rfc/rfc7950#section-9.7.4:
*
* The "bit" statement, which is a substatement to the "type" statement,
* MUST be present if the type is "bits".