[ML] Fix javadoc in MlStrings#hasValidLengthForId
Original commit: elastic/x-pack-elasticsearch@51af17b4b19832b3e51aa3b3e3c4d3c822c6c21d
@@ -65,7 +65,7 @@ public final class MlStrings {
/**
* Checks if the given {@code id} has a valid length.
- * We keep IDs in a length < {@link #ID_LENGTH_LIMIT}
+ * We keep IDs in a length shorter or equal than {@link #ID_LENGTH_LIMIT}
* in order to avoid unfriendly errors when storing docs with
* more than 512 bytes.
*
