zeppelin git commit: [HOTFIX]. Minor doc fix for back-end-angular.md

[zj...@apache.org]

Repository: zeppelin
Updated Branches:
  refs/heads/master 6c4ccf331 -> 2a06292c1


[HOTFIX]. Minor doc fix for back-end-angular.md

### What is this PR for?
The example in the doc would fail due to typo, straightforward fix.

### What type of PR is it?
[Hot Fix]

### Todos
* [ ] - Task

### How should this be tested?
Outline the steps to test the PR here.

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Jeff Zhang <zj...@apache.org>

Closes #2307 from zjffdu/doc_hotfix and squashes the following commits:

133fe72 [Jeff Zhang] [HOTFIX]. Minor doc fix for back-end-angular.md


Project: http://git-wip-us.apache.org/repos/asf/zeppelin/repo
Commit: http://git-wip-us.apache.org/repos/asf/zeppelin/commit/2a06292c
Tree: http://git-wip-us.apache.org/repos/asf/zeppelin/tree/2a06292c
Diff: http://git-wip-us.apache.org/repos/asf/zeppelin/diff/2a06292c

Branch: refs/heads/master
Commit: 2a06292c1fcc64ea4e503a29212a179f93699b07
Parents: 6c4ccf3
Author: Jeff Zhang <zj...@apache.org>
Authored: Tue May 2 18:03:11 2017 +0800
Committer: Jeff Zhang <zj...@apache.org>
Committed: Wed May 3 10:28:08 2017 +0800

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 docs/displaysystem/back-end-angular.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/zeppelin/blob/2a06292c/docs/displaysystem/back-end-angular.md
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diff --git a/docs/displaysystem/back-end-angular.md b/docs/displaysystem/back-end-angular.md
index 432036c..fb43ea4 100644
--- a/docs/displaysystem/back-end-angular.md
+++ b/docs/displaysystem/back-end-angular.md
@@ -112,7 +112,7 @@ import AngularElem._
 ### Display Element
 ```scala
 // automatically convert to string and print with %angular display system directive in front.
-<div><div>.display
+<div></div>.display
 ```
 ### Event Handler
 ```scala