Update tabs.py

[oliviermarquez]

fixes tab buttons of student's dahsboard for i18n - replace pr #1234 and pr #757

[sarina]

remove +

[sarina]

Looks good to me. @adampalay can you take a look too?

@oliviermarquez I'll run the test suite on your code once you remove the syntax error.

[adampalay]

Yeah, once you remove the +s, it looks great

[sarina]

@oliviermarquez please make another comment on this PR when you fix the issue, so I know to take another look at the PR. Thanks!

[sarina]

Please squash your commits into one commit by running this command:

$ git rebase -i HEAD~3

Check out https://help.github.com/articles/interactive-rebase for more help. Once you've done this please comment on the PR.

[oliviermarquez]

-> PR #1507

[sarina]

We'd really prefer you simply rebase and stay on the same pull request, because closing a request and opening a new one loses the comment and review history. In the future please do this. Ask on the IRC channel or the edx email list if you need help with rebasing.

[sarina]

Also, you can make comments on the pull request to ask for help.