Isn't the encoding described in tidb-internal-2 wrong?

[MyonKeminta]

If I didn't get into mistake while reading the source code, when we encodes a key, we put the table_id just after the table prefix b"t". That is, the key format are like:

t{table_id}_r{record_id}

However this article says:

Key： tablePrefix_rowPrefix_tableID_rowID

It results in that someone (including me) get confused while trying to understand the encoding of keys.

[siyu-hu]

@shenli PTAL