extracted StringExtensions
extracted StringBuilderExtensions
extracted TypeExtensions
extracted MethodBaseExtensions
renamed remaining CommonExtensions to EnumerableExtensions
updated EnumerableExtensionsTests to FluentAssertions
moved IFakeObjectCall extensions to FakeObjectCallExtensions
moved last Expression extension from Helpers to ExpressionExtensions
moved InvokesExtensions to CallbackConfigurationExtensions
moved MatchingExtensions to CompletedFakeObjectCallExtensions
merged MustHaveHappenedExtensions and MustNotHappenedExtensions into AssertConfigurationExtensions
merged OnceExtensions and TwiceExtensions into RepeatConfigurationExtensions
moved OutputWriter to OutputWriterExtensions
merged ReturnsExtensions, ReturnsLazilyExtensions, and ReturnsNextFromSequenceExtensions into ReturnValueConfigurationExtensions
moved StrictExtensions to FakeOptionsBuilderExtensions
moved ArgumentConstraintExtensions to ArgumentConstraintManagerExtensions
moved ThrowsExtensions to ExceptionThrowerConfigurationExtensions
moved WhereExtensions to WhereConfigurationExtensions
moved WithAnyArgumentsExtensions to ArgumentValidationConfigurationExtensions
merged WriteExtensions into FakeObjectCallExtensions