Use boolean instead of 0/1 for condition check

[leikdga]

Feature or enhancement

In Lib/filecmp.py, line 160, we use a variable ok to check a condition. We use 0/1 to denote false/true here. A better coding style is using False/True.

Pitch

First, using True/False itself is a better coding style.

Second, if 1 is slower than if True (although the difference is small).

Previous discussion

N/A