Merge pull request #219 from katrinleinweber/patch-2

Fix source of typo #646

bin/lesson_initialize.py

@@ -87,7 +87,7 @@ and to meet some of our community members.
 There are many ways to contribute,
 from writing new exercises and improving existing ones
 to updating or filling in the documentation
-and and submitting [bug reports][issues]
+and submitting [bug reports][issues]
 about things that don't work, aren't clear, or are missing.
 If you are looking for ideas, please see the 'Issues' tab for
 a list of issues associated with this repository,