Notable Rendering and Layout Changes after v3.7

Changes

(Only Affects Tests) FlutterTest is now the default test font

Changes

This section lists the notable non-API breaking changes.

(Only Affects Tests) FlutterTest is now the default test font

The FlutterTest font produces more precise font and glyph metrics than Ahem, 
and the metrics are generally font-engine agnostic. See the Flutter Test Fonts 
wiki page for more details about the test font.

Differences

The FlutterTest font looks almost identical to the old default Ahem: the
glyph for most characters is a box that fills the em square. The notable
differences between the FlutterTest font and Ahem font are:

1. Different baseline location