Ruby 2.7 separated Time#to_s method from Time#inspect.

They were separated due to some troubles in the comparison of Time objects whose fractional parts were different.

For example, there are multiple time objects which are generated in a single HTTP request. They would be definitely different by some seconds. So assert_equal should fail.

But when we use assert_equal with inspect, it will return true as the fractional parts are ignored.

#### In Ruby 2.7.0

As seen above the fractional part is now not ignored when we use inspect.