Docs/skip lessons

README.rst

@@ -116,7 +116,22 @@ In my case I'm using Python 3 with Windows, so I fire up my command
 shell (cmd.exe) and run this:
 
 .. image:: https://user-images.githubusercontent.com/2614930/28401747-f723ff00-6cd0-11e7-9b9a-a6993b753cf6.png
+Skipping to a Specific Lesson
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+If you have already completed earlier koans or want to work on a specific
+lesson, you can start the koans from that lesson by passing the lesson name as
+an argument.
+
+For example::
+
+    python contemplate_koans.py about_strings
+
+or:
+
+    python3 contemplate_koans.py about_strings
+
+This starts the koans from ``about_strings`` instead of the first lesson.
 Apparently a test failed::
 
     AssertionError: False is not True

koans/about_strings.py

@@ -1,6 +1,8 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+
+
 from runner.koan import *
 
 class AboutStrings(Koan):
@@ -26,12 +28,15 @@ def test_raw_strings_are_also_strings(self):
         self.assertEqual(__, isinstance(string, str))
 
     def test_use_single_quotes_to_create_string_with_double_quotes(self):
-        string = 'He said, "Go Away."'
-        self.assertEqual(__, string)
+        single_quoted = 'He said, "Go Away."'
+        double_quoted = "He said, \"Go Away.\""
+        self.assertEqual(__, single_quoted == double_quoted)
 
     def test_use_double_quotes_to_create_strings_with_single_quotes(self):
-        string = "Don't"
-        self.assertEqual(__, string)
+        double_quoted = "Don't"
+        single_quoted = 'Don\'t'
+
+        self.assertEqual(__, single_quoted == double_quoted)
 
     def test_use_backslash_for_escaping_quotes_in_strings(self):
         a = "He said, \"Don't\""