typo in projected_columns.h document

[wangqiim]

Typo

document typo

noisepage/src/include/storage/projected_columns.h

Lines 11 to 31 in 54036a8

	/**
	* ProjectedColumns represents partial images of a collection of tuples, where columns from different
	* tuples are laid out continuously. This can be considered a collection of ProjectedRows, but optimized
	* for continuous column access like PAX. However, a ProjectedRow is almost always externally coupled to a known
	* tuple slot, so it is more compact in layout than MaterializedColumns, which has to also store the
	* TupleSlot information for each tuple. The inner class RowView provides access to the underlying logical
	* projected rows with the same interface as a real ProjectedRow.
	* -------------------------------------------------------------------------------------
	* | size | max_tuples | num_tuples | num_cols | attr_end[4] | col_id1 | col_id2 | ... |
	* -------------------------------------------------------------------------------------
	* | val1_offset | val2_offset | ... | TupleSlot_1 | TupleSlot_2 | ... |
	* -------------------------------------------------------------------------------------
	* | null-bitmap, col_id1 | val1, col_id1 | val2, col_id1 | ... |
	* -------------------------------------------------------------------------------------
	* | null-bitmap, col_id1 | val1, col_id2 | val2, col_id2 | ... |
	* -------------------------------------------------------------------------------------
	* | ... |
	* -------------------------------------------------------------------------------------
	*/
	// PACKED for the same reason as ProjectedRow
	class PACKED ProjectedColumns {

In line:25, I think it expected is

* | null-bitmap, col_id2 | val1, col_id2 | val2, col_id2 |             ...            |