QuickstartCommand: Fix a minor typo in docs
QuickstartCommand: Fix a minor typo in docs

Closes https://github.com/facebook/buck/pull/323

Test Plan: Generate javadoc and check that the typo is fixed.

robbertvanginkel/buck,artiya4u/buck,LegNeato/buck,rmaz/buck,pwz3n0/buck,k21/buck,romanoid/buck,grumpyjames/buck,rmaz/buck,janicduplessis/buck,stuhood/buck,1yvT0s/buck,zhan-xiong/buck,janicduplessis/buck,bocon13/buck,vschs007/buck,rhencke/buck,nguyentruongtho/buck,neonichu/buck,rmaz/buck,Dominator008/buck,shybovycha/buck,ilya-klyuchnikov/buck,kageiit/buck,janicduplessis/buck,dsyang/buck,nguyentruongtho/buck,dushmis/buck,facebook/buck,OkBuilds/buck,justinmuller/buck,k21/buck,Heart2009/buck,stuhood/buck,tgummerer/buck,dpursehouse/buck,mogers/buck,bocon13/buck,zhan-xiong/buck,pwz3n0/buck,vine/buck,stuhood/buck,daedric/buck,bocon13/buck,bocon13/buck,tgummerer/buck,nguyentruongtho/buck,robbertvanginkel/buck,robbertvanginkel/buck,Addepar/buck,SeleniumHQ/buck,sdwilsh/buck,tgummerer/buck,shs96c/buck,justinmuller/buck,justinmuller/buck,neonichu/buck,brettwooldridge/buck,davido/buck,tgummerer/buck,siddhartharay007/buck,Dominator008/buck,shs96c/buck,liuyang-li/buck,LegNeato/buck,clonetwin26/buck,mnuessler/buck,rowillia/buck,raviagarwal7/buck,illicitonion/buck,shybovycha/buck,raviagarwal7/buck,Learn-Android-app/buck,lukw00/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,lukw00/buck,dsyang/buck,darkforestzero/buck,darkforestzero/buck,hgl888/buck,neonichu/buck,neonichu/buck,romanoid/buck,shybovycha/buck,brettwooldridge/buck,rmaz/buck,robbertvanginkel/buck,artiya4u/buck,rowillia/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,grumpyjames/buck,dushmis/buck,marcinkwiatkowski/buck,dpursehouse/buck,stuhood/buck,SeleniumHQ/buck,artiya4u/buck,shs96c/buck,mogers/buck,k21/buck,hgl888/buck,davido/buck,hgl888/buck,mikekap/buck,romanoid/buck,neonichu/buck,Dominator008/buck,liuyang-li/buck,MarkRunWu/buck,ilya-klyuchnikov/buck,daedric/buck,grumpyjames/buck,raviagarwal7/buck,pwz3n0/buck,kageiit/buck,lukw00/buck,Addepar/buck,JoelMarcey/buck,daedric/buck,clonetwin26/buck,robbertvanginkel/buck,LegNeato/buck,luiseduardohdbackup/buck,zhuxiaohao/buck,k21/buck,liuyang-li/buck,vschs007/buck,zhuxiaohao/buck,k21/buck,zpao/buck,dsyang/buck,JoelMarcey/buck,Distrotech/buck,mikekap/buck,stuhood/buck,zpao/buck,ilya-klyuchnikov/buck,dsyang/buck,raviagarwal7/buck,rmaz/buck,shybovycha/buck,facebook/buck,artiya4u/buck,dushmis/buck,Addepar/buck,Learn-Android-app/buck,marcinkwiatkowski/buck,daedric/buck,vschs007/buck,brettwooldridge/buck,illicitonion/buck,dsyang/buck,shybovycha/buck,daedric/buck,dushmis/buck,romanoid/buck,dsyang/buck,pwz3n0/buck,mikekap/buck,Dominator008/buck,pwz3n0/buck,tgummerer/buck,facebook/buck,mnuessler/buck,dushmis/buck,liuyang-li/buck,bocon13/buck,Learn-Android-app/buck,zhuxiaohao/buck,mikekap/buck,JoelMarcey/buck,rowillia/buck,mnuessler/buck,OkBuilds/buck,facebook/buck,davido/buck,shs96c/buck,rmaz/buck,raviagarwal7/buck,janicduplessis/buck,vine/buck,sdwilsh/buck,JoelMarcey/buck,stuhood/buck,Distrotech/buck,vine/buck,Heart2009/buck,justinmuller/buck,rmaz/buck,davido/buck,grumpyjames/buck,mogers/buck,stuhood/buck,zhan-xiong/buck,neonichu/buck,bocon13/buck,hgl888/buck,Learn-Android-app/buck,raviagarwal7/buck,daedric/buck,LegNeato/buck,k21/buck,Distrotech/buck,grumpyjames/buck,illicitonion/buck,mikekap/buck,liuyang-li/buck,1yvT0s/buck,darkforestzero/buck,siddhartharay007/buck,kageiit/buck,Distrotech/buck,vine/buck,Heart2009/buck,vine/buck,MarkRunWu/buck,luiseduardohdbackup/buck,darkforestzero/buck,facebook/buck,rmaz/buck,tgummerer/buck,neonichu/buck,raviagarwal7/buck,luiseduardohdbackup/buck,shybovycha/buck,grumpyjames/buck,hgl888/buck,romanoid/buck,janicduplessis/buck,nguyentruongtho/buck,bocon13/buck,SeleniumHQ/buck,grumpyjames/buck,JoelMarcey/buck,janicduplessis/buck,JoelMarcey/buck,dpursehouse/buck,SeleniumHQ/buck,mogers/buck,davido/buck,1yvT0s/buck,Dominator008/buck,OkBuilds/buck,nguyentruongtho/buck,Learn-Android-app/buck,sdwilsh/buck,rowillia/buck,clonetwin26/buck,shybovycha/buck,ilya-klyuchnikov/buck,lukw00/buck,pwz3n0/buck,dsyang/buck,luiseduardohdbackup/buck,SeleniumHQ/buck,Distrotech/buck,Addepar/buck,brettwooldridge/buck,zhan-xiong/buck,luiseduardohdbackup/buck,OkBuilds/buck,zpao/buck,mogers/buck,clonetwin26/buck,Heart2009/buck,JoelMarcey/buck,rmaz/buck,neonichu/buck,liuyang-li/buck,sdwilsh/buck,kageiit/buck,Dominator008/buck,robbertvanginkel/buck,k21/buck,1yvT0s/buck,Distrotech/buck,justinmuller/buck,rhencke/buck,davido/buck,ilya-klyuchnikov/buck,romanoid/buck,pwz3n0/buck,Dominator008/buck,zhan-xiong/buck,davido/buck,neonichu/buck,LegNeato/buck,mnuessler/buck,Distrotech/buck,SeleniumHQ/buck,sdwilsh/buck,bocon13/buck,vine/buck,pwz3n0/buck,vine/buck,ilya-klyuchnikov/buck,dushmis/buck,LegNeato/buck,robbertvanginkel/buck,1yvT0s/buck,romanoid/buck,Distrotech/buck,JoelMarcey/buck,janicduplessis/buck,justinmuller/buck,kageiit/buck,shybovycha/buck,romanoid/buck,LegNeato/buck,ilya-klyuchnikov/buck,illicitonion/buck,daedric/buck,brettwooldridge/buck,Heart2009/buck,pwz3n0/buck,sdwilsh/buck,zhan-xiong/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,rowillia/buck,sdwilsh/buck,illicitonion/buck,artiya4u/buck,rhencke/buck,romanoid/buck,MarkRunWu/buck,marcinkwiatkowski/buck,marcinkwiatkowski/buck,rmaz/buck,clonetwin26/buck,justinmuller/buck,zhuxiaohao/buck,sdwilsh/buck,robbertvanginkel/buck,mikekap/buck,illicitonion/buck,mikekap/buck,rmaz/buck,hgl888/buck,vschs007/buck,nguyentruongtho/buck,Addepar/buck,kageiit/buck,zhan-xiong/buck,vschs007/buck,brettwooldridge/buck,artiya4u/buck,kageiit/buck,JoelMarcey/buck,MarkRunWu/buck,mogers/buck,MarkRunWu/buck,OkBuilds/buck,vschs007/buck,MarkRunWu/buck,daedric/buck,rowillia/buck,raviagarwal7/buck,marcinkwiatkowski/buck,zpao/buck,MarkRunWu/buck,rowillia/buck,dsyang/buck,daedric/buck,k21/buck,rhencke/buck,janicduplessis/buck,facebook/buck,nguyentruongtho/buck,mogers/buck,OkBuilds/buck,bocon13/buck,robbertvanginkel/buck,lukw00/buck,OkBuilds/buck,Dominator008/buck,justinmuller/buck,illicitonion/buck,vine/buck,hgl888/buck,Distrotech/buck,vschs007/buck,hgl888/buck,illicitonion/buck,shs96c/buck,siddhartharay007/buck,rowillia/buck,luiseduardohdbackup/buck,clonetwin26/buck,sdwilsh/buck,darkforestzero/buck,rowillia/buck,ilya-klyuchnikov/buck,bocon13/buck,LegNeato/buck,marcinkwiatkowski/buck,zpao/buck,shybovycha/buck,raviagarwal7/buck,lukw00/buck,dpursehouse/buck,justinmuller/buck,OkBuilds/buck,shs96c/buck,janicduplessis/buck,mikekap/buck,sdwilsh/buck,daedric/buck,Addepar/buck,lukw00/buck,luiseduardohdbackup/buck,grumpyjames/buck,tgummerer/buck,robbertvanginkel/buck,mnuessler/buck,marcinkwiatkowski/buck,Distrotech/buck,grumpyjames/buck,vine/buck,darkforestzero/buck,dsyang/buck,romanoid/buck,vine/buck,liuyang-li/buck,raviagarwal7/buck,k21/buck,mikekap/buck,zhan-xiong/buck,1yvT0s/buck,raviagarwal7/buck,darkforestzero/buck,rhencke/buck,dushmis/buck,Learn-Android-app/buck,justinmuller/buck,Addepar/buck,rowillia/buck,siddhartharay007/buck,siddhartharay007/buck,k21/buck,stuhood/buck,1yvT0s/buck,justinmuller/buck,dushmis/buck,bocon13/buck,vschs007/buck,dsyang/buck,tgummerer/buck,k21/buck,LegNeato/buck,dpursehouse/buck,lukw00/buck,1yvT0s/buck,pwz3n0/buck,rmaz/buck,pwz3n0/buck,darkforestzero/buck,davido/buck,mnuessler/buck,brettwooldridge/buck,grumpyjames/buck,shs96c/buck,vschs007/buck,mikekap/buck,dpursehouse/buck,davido/buck,k21/buck,dsyang/buck,davido/buck,daedric/buck,romanoid/buck,Heart2009/buck,Addepar/buck,darkforestzero/buck,dsyang/buck,daedric/buck,brettwooldridge/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,liuyang-li/buck,darkforestzero/buck,raviagarwal7/buck,Addepar/buck,Dominator008/buck,dsyang/buck,illicitonion/buck,LegNeato/buck,justinmuller/buck,stuhood/buck,brettwooldridge/buck,JoelMarcey/buck,vine/buck,illicitonion/buck,shybovycha/buck,zhan-xiong/buck,Dominator008/buck,rowillia/buck,k21/buck,SeleniumHQ/buck,liuyang-li/buck,zpao/buck,siddhartharay007/buck,zhan-xiong/buck,marcinkwiatkowski/buck,brettwooldridge/buck,Addepar/buck,shs96c/buck,sdwilsh/buck,bocon13/buck,mnuessler/buck,luiseduardohdbackup/buck,marcinkwiatkowski/buck,artiya4u/buck,romanoid/buck,LegNeato/buck,shybovycha/buck,illicitonion/buck,mogers/buck,OkBuilds/buck,clonetwin26/buck,raviagarwal7/buck,dpursehouse/buck,marcinkwiatkowski/buck,brettwooldridge/buck,OkBuilds/buck,Heart2009/buck,janicduplessis/buck,Addepar/buck,Learn-Android-app/buck,OkBuilds/buck,clonetwin26/buck,siddhartharay007/buck,romanoid/buck,rowillia/buck,shybovycha/buck,liuyang-li/buck,daedric/buck,Learn-Android-app/buck,vschs007/buck,SeleniumHQ/buck,marcinkwiatkowski/buck,zhuxiaohao/buck,Learn-Android-app/buck,stuhood/buck,rmaz/buck,Distrotech/buck,Addepar/buck,artiya4u/buck,robbertvanginkel/buck,OkBuilds/buck,liuyang-li/buck,clonetwin26/buck,shs96c/buck,clonetwin26/buck,brettwooldridge/buck,lukw00/buck,Dominator008/buck,artiya4u/buck,dushmis/buck,sdwilsh/buck,JoelMarcey/buck,vschs007/buck,zhuxiaohao/buck,zhuxiaohao/buck,lukw00/buck,LegNeato/buck,marcinkwiatkowski/buck,mogers/buck,zhuxiaohao/buck,luiseduardohdbackup/buck,Heart2009/buck,ilya-klyuchnikov/buck,zpao/buck,SeleniumHQ/buck,robbertvanginkel/buck,janicduplessis/buck,LegNeato/buck,clonetwin26/buck,shs96c/buck,Heart2009/buck,rhencke/buck,zhan-xiong/buck,davido/buck,dushmis/buck,lukw00/buck,SeleniumHQ/buck,janicduplessis/buck,justinmuller/buck,robbertvanginkel/buck,illicitonion/buck,1yvT0s/buck,siddhartharay007/buck,davido/buck,mikekap/buck,vschs007/buck,JoelMarcey/buck,artiya4u/buck,rhencke/buck,dpursehouse/buck,zhan-xiong/buck,clonetwin26/buck,Learn-Android-app/buck,rhencke/buck,davido/buck,brettwooldridge/buck,MarkRunWu/buck,tgummerer/buck,rhencke/buck,zhuxiaohao/buck,shs96c/buck,OkBuilds/buck,mogers/buck,tgummerer/buck,shs96c/buck,marcinkwiatkowski/buck,grumpyjames/buck,darkforestzero/buck,Learn-Android-app/buck,vschs007/buck,darkforestzero/buck,darkforestzero/buck,hgl888/buck,rhencke/buck,artiya4u/buck,mogers/buck,mnuessler/buck,Dominator008/buck,sdwilsh/buck,mikekap/buck,zhan-xiong/buck,facebook/buck,siddhartharay007/buck,shs96c/buck,shybovycha/buck,rhencke/buck,mnuessler/buck,Addepar/buck,clonetwin26/buck,illicitonion/buck,stuhood/buck,grumpyjames/buck,tgummerer/buck