Fix typo in UOp Pair Stats Output by JeffersGlass · Pull Request #120846 · python/cpython

This is a one-line fix - when outputting pystats, the stats for UOps are mostly output with the prefix uops, but the pair counts are output with the prefix uop. This causes the names of the ops appear with an additional [ in front of them when printed.

This is a minor fix with no corresponding issue or discussion.