Assert on string should show at least the first difference.

[nohwnd]

Special case the AreEqual when the type is string and show at least the first diff of the string. Compare the mstest vs nunit vs xunit experience.

mstest

nunit

xunit

advantages of nunit are that it uses ascii only characters, so we won't run into issues with the console not being utf8 #2491

A longer input should consider the size of the screen and select appropriate amount of characters, preferring the context before the diff, rather than putting them 50:50 or at the beginning. (at least this is my experience from Pester, where we changed the approach quite a lot)

For contexts where we don't know the output size we should select a reasonable minimum,

Prefer showing the texts even when the sizes of the strings vary.