Some doc fixes
Some doc fixes

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alpha/spark,poffuomo/spark,MLnick/spark,kissmetrics/spark,ahnqirage/spark,srowen/spark,ddna1021/spark,lxsmnv/spark,esi-mineset/spark,taroplus/spark,eyalfa/spark,nchammas/spark,spark-test/spark,vinodkc/spark,ioana-delaney/spark,JerryLead/spark,jkbradley/spark,janewangfb/spark,cloud-fan/spark,bdrillard/spark,jlopezmalla/spark,SHASHANKB/spark,ericvandenbergfb/spark,tengpeng/spark,eyalfa/spark,liyichao/spark,yanboliang/spark,MLnick/spark,darionyaphet/spark,ptkool/spark,dbtsai/spark,1haodian/spark,big-pegasus/spark,zzcclp/spark,JoshRosen/spark,xuanyuanking/spark,saltstar/spark,SnappyDataInc/spark,debugger87/spark,dbtsai/spark,WeichenXu123/spark,chuckchen/spark,1haodian/spark,dongjoon-hyun/spark,aray/spark,dongjoon-hyun/spark,kiszk/spark,hvanhovell/spark,someorz/spark,jlopezmalla/spark,rekhajoshm/spark,UndeadBaneGitHub/spark,bdrillard/spark,ahnqirage/spark,darionyaphet/spark,rezasafi/spark,stanzhai/spark,liutang123/spark,WeichenXu123/spark,techaddict/spark,alunarbeach/spark,gioenn/xSpark,darionyaphet/spark,actuaryzhang/spark,narahari92/spark,holdenk/spark,apache-spark-on-k8s/spark,kiszk/spark,chuckchen/spark,eyalfa/spark,nilsgrabbert/spark,ron8hu/spark,sureshthalamati/spark,andrewor14/iolap,WindCanDie/spark,ajaysaini725/spark,mike0sv/spark,map222/spark,milliman/spark,haowu80s/spark,dongjoon-hyun/spark,szhem/spark,nlalevee/spark,aosagie/spark,jianran/spark,debugger87/spark,zhouyejoe/spark,witgo/spark,jrshust/spark,HyukjinKwon/spark,SnappyDataInc/spark,wangmiao1981/spark,sryza/spark,narahari92/spark,ueshin/apache-spark,cloudera/spark,skonto/spark,xflin/spark,LantaoJin/spark,cin/spark,SnappyDataInc/spark,aray/spark,spark-test/spark,LantaoJin/spark,bOOm-X/spark,ioana-delaney/spark,darionyaphet/spark,milliman/spark,dbtsai/spark,kevinyu98/spark,joseph-torres/spark,rikima/spark,huang1900/spark,map222/spark,stanzhai/spark,SHASHANKB/spark,ron8hu/spark,adrian-ionescu/apache-spark,byakuinss/spark,wangyum/spark,haowu80s/spark,lxsmnv/spark,kissmetrics/spark,rednaxelafx/apache-spark,wangmiao1981/spark,patrick-nicholson/spark,aosagie/spark,janewangfb/spark,milliman/spark,wzhfy/spark,ptkool/spark,shaneknapp/spark,panfengfeng/spark,xflin/spark,poffuomo/spark,caneGuy/spark,andrewor14/iolap,highfei2011/spark,jkbradley/spark,akopich/spark,liyichao/spark,zzcclp/spark,zuotingbing/spark,adrian-ionescu/apache-spark,facaiy/spark,szhem/spark,Panos-Bletsos/spark-cost-model-optimizer,mzl9039/spark,UndeadBaneGitHub/spark,saturday-shi/spark,icexelloss/spark,debugger87/spark,pronix/spark,ioana-delaney/spark,ueshin/apache-spark,shubhamchopra/spark,xuanyuanking/spark,hhbyyh/spark,publicRoman/spark,zuotingbing/spark,ahnqirage/spark,hvanhovell/spark,andrewor14/iolap,LantaoJin/spark,shuangshuangwang/spark,rekhajoshm/spark,kiszk/spark,wangmiao1981/spark,poffuomo/spark,MLnick/spark,dhruve/spark,HyukjinKwon/spark,maropu/spark,nchammas/spark,someorz/spark,bOOm-X/spark,sachintyagi22/spark,andrewor14/spark,shuangshuangwang/spark,lxsmnv/spark,nlalevee/spark,wangyum/spark,sachintyagi22/spark,alunarbeach/spark,metamx/spark,rikima/spark,apache-spark-on-k8s/spark,andrewor14/iolap,patrick-nicholson/spark,aray/spark,dhruve/spark,cin/spark,ueshin/apache-spark,liutang123/spark,bOOm-X/spark,cloud-fan/spark,BryanCutler/spark,sureshthalamati/spark,apache-spark-on-k8s/spark,panfengfeng/spark,nlalevee/spark,jiangxb1987/spark,kiszk/spark,cloud-fan/spark,aray/spark,dongjoon-hyun/spark,bravo-zhang/spark,zzcclp/spark,debugger87/spark,brad-kaiser/spark,hhbyyh/spark,publicRoman/spark,tejasapatil/spark,map222/spark,panfengfeng/spark,saltstar/spark,sureshthalamati/spark,zhouyejoe/spark,ptkool/spark,akopich/spark,srowen/spark,metamx/spark,saturday-shi/spark,michalsenkyr/spark,pronix/spark,zero323/spark,nilsgrabbert/spark,rekhajoshm/spark,minixalpha/spark,aosagie/spark,LantaoJin/spark,kissmetrics/spark,sahilTakiar/spark,ueshin/apache-spark,adrian-ionescu/apache-spark,markhamstra/spark,minixalpha/spark,dotunolafunmiloye/spark,szhem/spark,goldmedal/spark,JerryLead/spark,adrian-ionescu/apache-spark,wzhfy/spark,dongjoon-hyun/spark,zero323/spark,bravo-zhang/spark,sachintyagi22/spark,publicRoman/spark,ahnqirage/spark,byakuinss/spark,someorz/spark,rekhajoshm/spark,stanzhai/spark,spark-test/spark,ericvandenbergfb/spark,UndeadBaneGitHub/spark,lvdongr/spark,jlopezmalla/spark,mdespriee/spark,adrian-ionescu/apache-spark,huang1900/spark,mahak/spark,vinodkc/spark,shaneknapp/spark,map222/spark,shuangshuangwang/spark,metamx/spark,aosagie/spark,WeichenXu123/spark,rezasafi/spark,setjet/spark,techaddict/spark,vinodkc/spark,panfengfeng/spark,shubhamchopra/spark,patrick-nicholson/spark,mike0sv/spark,darionyaphet/spark,WeichenXu123/spark,mdespriee/spark,zzcclp/spark,UndeadBaneGitHub/spark,dhruve/spark,liutang123/spark,brad-kaiser/spark,zuotingbing/spark,esi-mineset/spark,Aegeaner/spark,esi-mineset/spark,bOOm-X/spark,jlopezmalla/spark,dongjoon-hyun/spark,esi-mineset/spark,panfengfeng/spark,eyalfa/spark,mdespriee/spark,mzl9039/spark,big-pegasus/spark,spark-test/spark,alunarbeach/spark,tejasapatil/spar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