Refine printing of integer literals

As discussed today; this MR partially reverts !387 (merged) to only print casts for integer literals less than 32 bit wide. 64-bit literals are instead printed with the LL suffix, since long long is the only type guaranteed to be 64 bit wide on both Unix and Windows systems (cppreference).

requested review from @he66coqe

assigned to @da15siwa

approved this merge request

For documentation: long long is at least 64 bit.

Yea, I grew a tiny bit anxious about that, too. But since there are no 128-bit systems around yet (as far as I know) and its exactly 64 bit on all systems we're targetting, I think there's not to worry.

Agreed.

mentioned in commit 7790ec6f

merged