Giving the users the power of Skips

We give the clients the nicity of not flooding them with errors and
failures when they fetch the lessons, but with this, we inform them how
they can control the skip behaviors, and how they can test individually
on demand.
fixes #297

Author: kotp

docs/TESTS.md

@@ -7,4 +7,81 @@ $ ruby hamming_test.rb
 ```
 
 Only the first test will be executed, all the others have been made pending
-using the `skip` method. Delete the next `skip` as you get each test passing.
+using the `skip` method. Delete or comment the next `skip` as you get
+each test passing.
+
+## Customizing Test Reporting
+
+If you want color, execute the tests with:
+
+```bash
+$ ruby hamming_test.rb -p
+```
+
+If you want to see the test names, execute the tests with:
+
+```bash
+$ ruby hamming_tests.rb -v
+```
+
+If you would like to run only one test, you can specify one or a group
+with regular expression style matching.
+
+```bash
+$ ruby hamming_tests.rb -n /empty/
+```
+
+You can combine the options as well.
+
+## Disabling All The Skips
+
+With your new found powers of being able to select the individual or
+groups of tests that you want to run, you may want to disable all the
+skips.
+
+### The Quick and Dirty
+
+Taking advantage of the fact that in Ruby methods are overridable, if
+you were to add this line of code;
+
+```ruby
+def skip ; end
+```
+
+like this in the Hamming test file
+
+```ruby
+class HammingTest < Minitest::Test
+  def skip ; end
+  def test_identical_strands
+```
+
+then all the skips will still evaluate, yet will let your tests run.
+
+### The Still Quick And Cleaner
+
+Of course, editing all the files through time can be irritating, so you
+could do like we did in developing the exercises... make a file that has
+the skip definition in it, and require that as a library when we want
+it.
+
+We created a `lib` folder to keep our "helper" things in, and it looks
+like this:
+
+```ruby
+require 'minitest/autorun'
+# You can use this to disabe all skips in the current exercise by issuing the
+# following command:
+#     ruby -I../lib -rdisable_skip <fiename_test.rb>
+
+module Minitest
+  class Test
+    def skip(_msg='', _bt=caller)
+    end
+  end
+end
+```
+
+The description on how to use it is commented in that file listing, and
+the file listing is in its complete state.
+