[PySpark] Add blanklines to Python docstrings so example code renders correctly
[PySpark] Add blanklines to Python docstrings so example code renders correctly

Author: RJ Nowling <rnowling@gmail.com>

Closes #1808 from rnowling/pyspark_docs and squashes the following commits:

c06d774 [RJ Nowling] Add blanklines to Python docstrings so example code renders correctly

milliman/spark,UndeadBaneGitHub/spark,tengpeng/spark,jkbradley/spark,shubhamchopra/spark,rikima/spark,cin/spark,maropu/spark,ptkool/spark,aosagie/spark,WeichenXu123/spark,akopich/spark,vinodkc/spark,ConeyLiu/spark,BryanCutler/spark,minixalpha/spark,chuckchen/spark,apache-spark-on-k8s/spark,sahilTakiar/spark,mzl9039/spark,BryanCutler/spark,janewangfb/spark,kiszk/spark,janewangfb/spark,alunarbeach/spark,shuangshuangwang/spark,ConeyLiu/spark,holdenk/spark,rezasafi/spark,rekhajoshm/spark,ahnqirage/spark,actuaryzhang/spark,hhbyyh/spark,apache-spark-on-k8s/spark,shubhamchopra/spark,zzcclp/spark,aray/spark,adrian-ionescu/apache-spark,bravo-zhang/spark,publicRoman/spark,maropu/spark,highfei2011/spark,rezasafi/spark,shuangshuangwang/spark,highfei2011/spark,ron8hu/spark,icexelloss/spark,sureshthalamati/spark,kiszk/spark,saltstar/spark,bdrillard/spark,nlalevee/spark,Aegeaner/spark,someorz/spark,eyalfa/spark,wangmiao1981/spark,JoshRosen/spark,narahari92/spark,milliman/spark,mdespriee/spark,rikima/spark,yanboliang/spark,WeichenXu123/spark,zuotingbing/spark,rezasafi/spark,map222/spark,nchammas/spark,saturday-shi/spark,jkbradley/spark,kissmetrics/spark,kimoonkim/spark,poffuomo/spark,narahari92/spark,ahnqirage/spark,kimoonkim/spark,aokolnychyi/spark,mahak/spark,Panos-Bletsos/spark-cost-model-optimizer,Panos-Bletsos/spark-cost-model-optimizer,dhruve/spark,alunarbeach/spark,ahnqirage/spark,WindCanDie/spark,kimoonkim/spark,minixalpha/spark,witgo/spark,mzl9039/spark,nilsgrabbert/spark,liutang123/spark,rikima/spark,adrian-ionescu/apache-spark,aosagie/spark,map222/spark,wangyum/spark,1haodian/spark,JoshRosen/spark,joseph-torres/spark,shaneknapp/spark,sachintyagi22/spark,sachintyagi22/spark,techaddict/spark,gengliangwang/spark,poffuomo/spark,mdespriee/spark,WeichenXu123/spark,poffuomo/spark,rikima/spark,dbtsai/spark,tengpeng/spark,metamx/spark,icexelloss/spark,cin/spark,yanboliang/spark,eyalfa/spark,byakuinss/spark,spark-test/spark,sahilTakiar/spark,actuaryzhang/spark,kimoonkim/spark,bravo-zhang/spark,eyalfa/spark,xuanyuanking/spark,gengliangwang/spark,jkbradley/spark,taroplus/spark,icexelloss/spark,MLnick/spark,brad-kaiser/spark,ahnqirage/spark,kissmetrics/spark,szhem/spark,joseph-torres/spark,jlopezmalla/spark,rezasafi/spark,dhruve/spark,janewangfb/spark,nilsgrabbert/spark,alunarbeach/spark,aosagie/spark,ptkool/spark,LantaoJin/spark,dongjoon-hyun/spark,bdrillard/spark,metamx/spark,sureshthalamati/spark,gengliangwang/spark,pronix/spark,HyukjinKwon/spark,ConeyLiu/spark,mzl9039/spark,ericvandenbergfb/spark,liutang123/spark,mahak/spark,esi-mineset/spark,mzl9039/spark,saltstar/spark,ajaysaini725/spark,actuaryzhang/spark,lxsmnv/spark,Aegeaner/spark,aray/spark,maropu/spark,zzcclp/spark,sachintyagi22/spark,xflin/spark,ron8hu/spark,ajaysaini725/spark,ueshin/apache-spark,wangyum/spark,darionyaphet/spark,lvdongr/spark,sahilTakiar/spark,kevinyu98/spark,ron8hu/spark,zero323/spark,map222/spark,someorz/spark,bravo-zhang/spark,kevinyu98/spark,gengliangwang/spark,zzcclp/spark,techaddict/spark,bOOm-X/spark,srowen/spark,wangyum/spark,ioana-delaney/spark,janewangfb/spark,andrewor14/spark,zero323/spark,publicRoman/spark,highfei2011/spark,goldmedal/spark,spark-test/spark,alunarbeach/spark,ajaysaini725/spark,nilsgrabbert/spark,highfei2011/spark,sahilTakiar/spark,SnappyDataInc/spark,eyalfa/spark,wangmiao1981/spark,someorz/spark,ron8hu/spark,michalsenkyr/spark,lvdongr/spark,gioenn/xSpark,publicRoman/spark,ptkool/spark,sureshthalamati/spark,aray/spark,LantaoJin/spark,loneknightpy/spark,jlopezmalla/spark,skonto/spark,saturday-shi/spark,ericvandenbergfb/spark,guoxiaolongzte/spark,andrewor14/spark,stanzhai/spark,hvanhovell/spark,sureshthalamati/spark,WeichenXu123/spark,andrewor14/iolap,taroplus/spark,cloud-fan/spark,byakuinss/spark,vinodkc/spark,holdenk/spark,JerryLead/spark,kevinyu98/spark,wangyum/spark,chuckchen/spark,zhouyejoe/spark,ibm-research-ireland/sparkoscope,goldmedal/spark,ericvandenbergfb/spark,zzcclp/spark,vinodkc/spark,loneknightpy/spark,witgo/spark,LantaoJin/spark,andrewor14/spark,aosagie/spark,wzhfy/spark,skonto/spark,patrick-nicholson/spark,kiszk/spark,skonto/spark,liutang123/spark,ericvandenbergfb/spark,tejasapatil/spark,brad-kaiser/spark,1haodian/spark,spark-test/spark,MLnick/spark,minixalpha/spark,highfei2011/spark,cin/spark,haowu80s/spark,panfengfeng/spark,setjet/spark,kissmetrics/spark,1haodian/spark,eyalfa/spark,icexelloss/spark,panfengfeng/spark,kissmetrics/spark,bdrillard/spark,saltstar/spark,stanzhai/spark,BryanCutler/spark,witgo/spark,dhruve/spark,andrewor14/spark,xflin/spark,pgandhi999/spark,1haodian/spark,publicRoman/spark,actuaryzhang/spark,jrshust/spark,haowu80s/spark,JoshRosen/spark,huang1900/spark,goldmedal/spark,ibm-research-ireland/sparkoscope,esi-mineset/spark,dongjoon-hyun/spark,rednaxelafx/apache-spark,vinodkc/spark,Aegeaner/spark,debugger87/spark,1haodian/spark,shuangshuangwang/spark,Panos-Bletsos/spark-cost-model-optimizer,sachintyagi22/spark,adrian-ionescu/apache-spark,bdrillard/spark,akopich/spark,pronix/spark,nlal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