Implement Insert.AfterAll.IgnoringCase action with tests
Implement Insert.After.IgnoringCase action with tests
Implement Insert.AfterOccurrence.IgnoringCase action with tests
Implement Insert.Before.From action
Fix absent marker words in test names
Implement Insert.Before.IgnoringCase.From action
Implement Insert.BeforeOccurrence.IgnoringCase.From action
Implement Insert.After.From action

Some other tests were also fixed (Mismatched Before instead of After calls)
Implement Insert.After.IgnoringCase.From action
Implement Insert.AfterOccurrence.IgnoringCase.From action