[HOTFIX] Remove unintended characters from r tutorial
[HOTFIX] Remove unintended characters from r tutorial

### What is this PR for?
If user runs **Create a R Dataframe** paragraph in **Zeppelin Tutorial/R (SparkR)** note, he/she will get error because of some unintended characters inserted.

### What type of PR is it?
Documentation | Hot Fix

### Screenshots (if appropriate)
**Before**
![screen shot 2017-03-29 at 11 07 09 am](https://cloud.githubusercontent.com/assets/8503346/24435405/177f5c22-1470-11e7-868c-919fec07a2b3.png)

**After**
![screen shot 2017-03-29 at 11 06 52 am](https://cloud.githubusercontent.com/assets/8503346/24435417/1d7e2568-1470-11e7-9b1f-964d3157bf0d.png)

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

Author: Mina Lee <minalee@apache.org>

Closes #2200 from minahlee/hotfix/fixTypo and squashes the following commits:

2d2cb248 [Mina Lee] Remove unintended characters from r tutorial

volumeint/zeppelin,pellmont/zeppelin,astroshim/incubator-zeppelin,Nova-Boy/zeppelin,r-kamath/zeppelin,hammertank/zeppelin,openthings/zeppelin,herval/zeppelin,jongyoul/zeppelin,jongyoul/zeppelin,AlexanderShoshin/zeppelin,rconline/zeppelin,hkropp/incubator-zeppelin,Nova-Boy/zeppelin,sravan-s/zeppelin,Leemoonsoo/zeppelin,tzolov/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,jongyoul/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,rconline/zeppelin,herval/zeppelin,wary/zeppelin,AlexanderShoshin/zeppelin,cquptEthan/incubator-zeppelin,astroshim/incubator-zeppelin,Leemoonsoo/zeppelin,zetaris/zeppelin,fogbeam/zeppelin_mirror,AlexanderShoshin/zeppelin,1ambda/zeppelin,r-kamath/zeppelin,sctincman/zeppelin,zjffdu/zeppelin,pellmont/zeppelin,sohaibiftikhar/zeppelin,apache/incubator-zeppelin,volumeint/zeppelin,SarunasG/zeppelin-oidc,openthings/zeppelin,openthings/zeppelin,sctincman/zeppelin,cfries/zeppelin,sravan-s/zeppelin,jongyoul/zeppelin,r-kamath/incubator-zeppelin,r-kamath/zeppelin,sohaibiftikhar/zeppelin,r-kamath/incubator-zeppelin,wary/zeppelin,SarunasG/zeppelin-oidc,vrlo/zeppelin,namanmishra91/zeppelin,vipul1409/zeppelin,YuanGunGun/zeppelin,prabhjyotsingh/incubator-zeppelin,prabhjyotsingh/zeppelin,Nova-Boy/zeppelin,sctincman/zeppelin,prabhjyotsingh/zeppelin,soralee/zeppelin,tzolov/incubator-zeppelin,astroshim/zeppelin,sohaibiftikhar/zeppelin,lresende/incubator-zeppelin,pellmont/zeppelin,karuppayya/zeppelin,zetaris/zeppelin,YuanGunGun/zeppelin,astroshim/incubator-zeppelin,rconline/zeppelin,karuppayya/zeppelin,r-kamath/incubator-zeppelin,sravan-s/zeppelin,openthings/zeppelin,mwkang/zeppelin,zjffdu/zeppelin,herval/zeppelin,vipul1409/zeppelin,jongyoul/zeppelin,AlexanderShoshin/zeppelin,astroshim/zeppelin,pravin-dsilva/zeppelin,yu74n/zeppelin,jongyoul/zeppelin,prabhjyotsingh/incubator-zeppelin,apache/zeppelin,astroshim/zeppelin,radicalbit/incubator-zeppelin,pellmont/zeppelin,mwkang/zeppelin,datalayer/zeppelin,yu74n/zeppelin,hkropp/incubator-zeppelin,YuanGunGun/zeppelin,karuppayya/zeppelin,zetaris/zeppelin,1ambda/zeppelin,zjffdu/zeppelin,r-kamath/zeppelin,vrlo/zeppelin,benoyantony/zeppelin,sergeymazin/zeppelin,Leemoonsoo/zeppelin,sohaibiftikhar/zeppelin,benoyantony/zeppelin,zjffdu/zeppelin,apache/zeppelin,benoyantony/zeppelin,hammertank/zeppelin,apache/zeppelin,zetaris/zeppelin,cquptEthan/incubator-zeppelin,Leemoonsoo/zeppelin,YuanGunGun/zeppelin,datalayer/zeppelin,zetaris/zeppelin,volumeint/zeppelin,yu74n/zeppelin,sctincman/zeppelin,YuanGunGun/zeppelin,hkropp/incubator-zeppelin,soralee/zeppelin,zjffdu/zeppelin,lresende/incubator-zeppelin,rconline/zeppelin,AlexanderShoshin/zeppelin,openthings/zeppelin,hammertank/zeppelin,anthonycorbacho/incubator-zeppelin,vipul1409/zeppelin,namanmishra91/zeppelin,cfries/zeppelin,tinkoff-dwh/zeppelin,SarunasG/zeppelin-oidc,chilang/zeppelin,joroKr21/incubator-zeppelin,doanduyhai/incubator-zeppelin,astroshim/zeppelin,volumeint/zeppelin,Nova-Boy/zeppelin,yu74n/zeppelin,doanduyhai/incubator-zeppelin,vrlo/zeppelin,pravin-dsilva/zeppelin,vrlo/zeppelin,yu74n/zeppelin,joroKr21/incubator-zeppelin,r-kamath/incubator-zeppelin,wary/zeppelin,astroshim/incubator-zeppelin,mwkang/zeppelin,cfries/zeppelin,rconline/zeppelin,sctincman/zeppelin,chilang/zeppelin,sergeymazin/zeppelin,herval/zeppelin,Leemoonsoo/incubator-zeppelin,jongyoul/incubator-zeppelin,lresende/incubator-zeppelin,vrlo/zeppelin,cquptEthan/incubator-zeppelin,lresende/incubator-zeppelin,mwkang/zeppelin,chilang/zeppelin,sergeymazin/zeppelin,pellmont/zeppelin,apache/zeppelin,cfries/zeppelin,wary/zeppelin,1ambda/zeppelin,zjffdu/zeppelin,sohaibiftikhar/zeppelin,chilang/zeppelin,apache/incubator-zeppelin,joroKr21/incubator-zeppelin,herval/zeppelin,cfries/zeppelin,lresende/incubator-zeppelin,prabhjyotsingh/zeppelin,r-kamath/incubator-zeppelin,Leemoonsoo/zeppelin,herval/zeppelin,zjffdu/zeppelin,prabhjyotsingh/incubator-zeppelin,fogbeam/zeppelin_mirror,chilang/zeppelin,anthonycorbacho/incubator-zeppelin,SarunasG/zeppelin-oidc,sctincman/zeppelin,sravan-s/zeppelin,sravan-s/zeppelin,r-kamath/zeppelin,cquptEthan/incubator-zeppelin,mwkang/zeppelin,apache/zeppelin,mwkang/zeppelin,SachinJanani/zeppelin,apache/zeppelin,datalayer/zeppelin,apache/incubator-zeppelin,datalayer/zeppelin,cquptEthan/incubator-zeppelin,fogbeam/zeppelin_mirror,Nova-Boy/zeppelin,SarunasG/zeppelin-oidc,namanmishra91/zeppelin,VipinRathor/zeppelin,vrlo/zeppelin,doanduyhai/incubator-zeppelin,jongyoul/zeppelin,jongyoul/incubator-zeppelin,wary/zeppelin,sohaibiftikhar/zeppelin,cfries/zeppelin,soralee/zeppelin,karuppayya/zeppelin,hammertank/zeppelin,volumeint/zeppelin,prabhjyotsingh/incubator-zeppelin,apache/zeppelin,Leemoonsoo/incubator-zeppelin,jongyoul/incubator-zeppelin,r-kamath/zeppelin,r-kamath/incubator-zeppelin,volumeint/zeppelin,zetaris/zeppelin,karuppayya/zeppelin,sergeymazin/zeppelin,VipinRathor/zeppelin,datalayer/zeppelin,anthonycorbacho/incubator-zeppelin,karuppayya/zeppelin,anthonycorbacho/incubator-zeppelin,apache/incubator-zeppelin,radicalbit/incubator-zeppelin,astroshim/zeppelin,YuanGunGun/zeppelin,openthings/zeppelin,yu74n/zeppelin,sergeymazin/zeppelin,SarunasG/zeppelin-oidc,datalayer/zeppelin-datalayer,jongyoul/zeppelin,SachinJanani/zeppelin,sergeymazin/zeppelin,yu74n/zeppelin,Nova-Boy/zeppelin,radicalbit/incubator-zeppelin,sohaibiftikhar/zeppelin,datalayer/zeppelin-datalayer,lresende/incubator-zeppelin,openthings/zeppelin,tzolov/incubator-zeppelin,joroKr21/incubator-zeppelin,mwkang/zeppelin,Leemoonsoo/incubator-zeppelin,benoyantony/zeppelin,astroshim/incubator-zeppelin,SachinJanani/zeppelin,Leemoonsoo/zeppelin,pellmont/zeppelin,joroKr21/incubator-zeppelin,doanduyhai/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,tinkoff-dwh/zeppelin,cquptEthan/incubator-zeppelin,benoyantony/zeppelin,1ambda/zeppelin,hammertank/zeppelin,chilang/zeppelin,lresende/incubator-zeppelin,doanduyhai/incubator-zeppelin,pravin-dsilva/zeppelin,joroKr21/incubator-zeppelin,tzolov/incubator-zeppelin,VipinRathor/zeppelin,jongyoul/incubator-zeppelin,cfries/zeppelin,namanmishra91/zeppelin,prabhjyotsingh/zeppelin,namanmishra91/zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/incubator-zeppelin,SarunasG/zeppelin-oidc,pravin-dsilva/zeppelin,datalayer/zeppelin-datalayer,namanmishra91/zeppelin,prabhjyotsingh/incubator-zeppelin,tinkoff-dwh/zeppelin,YuanGunGun/zeppelin,SachinJanani/zeppelin,tinkoff-dwh/zeppelin,fogbeam/zeppelin_mirror,radicalbit/incubator-zeppelin,vipul1409/zeppelin,chilang/zeppelin,pravin-dsilva/zeppelin,tinkoff-dwh/zeppelin,hkropp/incubator-zeppelin,soralee/zeppelin,rconline/zeppelin,soralee/zeppelin,fogbeam/zeppelin_mirror,joroKr21/incubator-zeppelin,pravin-dsilva/zeppelin,prabhjyotsingh/zeppelin,astroshim/zeppelin,doanduyhai/incubator-zeppelin,VipinRathor/zeppelin,prabhjyotsingh/zeppelin,vipul1409/zeppelin,tinkoff-dwh/zeppelin,benoyantony/zeppelin,datalayer/zeppelin-datalayer,soralee/zeppelin,joroKr21/incubator-zeppelin,herval/zeppelin,hammertank/zeppelin,zetaris/zeppelin,anthonycorbacho/incubator-zeppelin,wary/zeppelin,doanduyhai/incubator-zeppelin,volumeint/zeppelin,Leemoonsoo/incubator-zeppelin,apache/incubator-zeppelin,r-kamath/zeppelin,hammertank/zeppelin,prabhjyotsingh/zeppelin,vrlo/zeppelin,apache/incubator-zeppelin,Leemoonsoo/zeppelin,astroshim/zeppelin,VipinRathor/zeppelin,SachinJanani/zeppelin,pravin-dsilva/zeppelin,datalayer/zeppelin,hkropp/incubator-zeppelin,sravan-s/zeppelin,SachinJanani/zeppelin,sergeymazin/zeppelin,fogbeam/zeppelin_mirror,namanmishra91/zeppelin,astroshim/incubator-zeppelin,karuppayya/zeppelin,radicalbit/incubator-zeppelin,sravan-s/zeppelin,soralee/zeppelin,AlexanderShoshin/zeppelin,tzolov/incubator-zeppelin,radicalbit/incubator-zeppelin,SachinJanani/zeppelin,cquptEthan/incubator-zeppelin,fogbeam/zeppelin_mirror,1ambda/zeppelin,rconline/zeppelin,r-kamath/incubator-zeppelin,1ambda/zeppelin,hkropp/incubator-zeppelin,1ambda/zeppelin,VipinRathor/zeppelin,Nova-Boy/zeppelin,radicalbit/incubator-zeppelin,tzolov/incubator-zeppelin,sctincman/zeppelin,jongyoul/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,wary/zeppelin,vipul1409/zeppelin,vipul1409/zeppelin,tinkoff-dwh/zeppelin,AlexanderShoshin/zeppelin,VipinRathor/zeppelin,pellmont/zeppelin,benoyantony/zeppelin,datalayer/zeppelin