added in-place modifications
Merge branch 'master' of github.com:pablito56/pycourse
Merge branch 'master' of github.com:pablito56/pycourse
added ignore to swp files
Merge branch 'master' of github.com:pablito56/pycourse
added exercises for strings
merged mutables
merged mutables
better text
removing duplicate explanation
exercise to TestCase structure
Merge pull request #6 from lerovitch/master

some exercises for mod_04