calculations comments outdated?

[tickioutlivetickeveryone]

can someone please explain this portion to me?
why 2476 / keys limit = ~12 and not 2478 / keys limit = ~12
also, why did we accommodate it to 10?

btree/src/page_layout.rs

Lines 35 to 46 in 055d08b

	/// On a 64 bit machine the maximum space to keep all of the pointer
	/// is 200 * 8 = 1600 bytes.
	#[allow(dead_code)]
	pub const MAX_SPACE_FOR_CHILDREN: usize = MAX_BRANCHING_FACTOR * PTR_SIZE;
	/// This leaves the keys of an internal node 2478 bytes:
	/// We use 1990 bytes for keys which leaves 488 bytes as junk.
	/// This means each key is limited to 12 bytes. (2476 / keys limit = ~12)
	/// Rounded down to 10 to accomodate the leave node.
	#[allow(dead_code)]
	pub const MAX_SPACE_FOR_KEYS: usize =
	PAGE_SIZE - INTERNAL_NODE_HEADER_SIZE - MAX_SPACE_FOR_CHILDREN;

[nimrodshn]

@tickioutlivetickeveryone I believe you are correct - if you would like to push a PR - I will approve and merge it. Otherwise I can fix it sometime. [This repo is no longer maintained really]