Use commas to separate thousands when printing memory stats
In GHCi, by enabling printing of timing/memory stats after each evaluation (
:set +s), the memory stats is printed in bytes. When this number is quite large, it's hard to see – at a glance – how much memory was used.
It would be nicer if this was printed as “1,200,000 bytes” instead of “1200000 bytes” as is the case now.