Tasks completed:
1. Locate ConsoleLauncher output
2. Check if actual and expected of AssertionFailedError are both type of CharSequence
To do list:
1. Add diff function dependency
2. Using diff to generate the output desired

Issue: junit-team#3139

Tasks completed:
1. Locate ConsoleLauncher output
2. Check if actual and expected of AssertionFailedError are both type of CharSequence
3. Add diff function dependency
4. Using diff to generate the output desired

Issue: junit-team#3139

delete one line of extra code

Fixed different profile issue.

Tasks completed:
1. Locate ConsoleLauncher output
2. Check if actual and expected of AssertionFailedError are both type of CharSequence
3. Add diff function dependency
4. Using diff to generate the output desired

ToDo:
1.Automatic test case for diff output

Issue: junit-team#3139

Issue: junit-team#3139

Add external diff module  to module documentation
For unknown reason, the test cases can not find the external module while the gradle can build normally.

Issue: junit-team#3139

1. Add diffPrinter class
2. replace diff in consoleTestExecutor with diffPrinter - will be deleted evetually
3. mark the location of adding diff in flatPrinter and verboseTreePrinter.

Issue: junit-team#3139

…e/tasks/DiffPrinter.java

Co-authored-by: Marc Philipp <[email protected]>

…e/tasks/DiffPrinter.java

Co-authored-by: Marc Philipp <[email protected]>

…e/tasks/DiffPrinter.java

Co-authored-by: Marc Philipp <[email protected]>

Only if one word has space, show inlineDiffByWord.

1. Add a `testPlan` getter to `platform/launcher/listeners/SummaryGeneratingListener.java`.

2. DiffPrinter now needs testPlan to display the testMethod info.
Issue: junit-team#3139

add testPlanCapturer listener

This reverts commit eef975b.