doc: merged and updated old docs for Enumerable#zip
doc: merged and updated old docs for Enumerable#zip

loduis/prototype,292388900/prototype,sdumitriu/prototype,fashionsun/prototype,ldf7801528/prototype,leafo/prototype,sdumitriu/prototype,Gargaj/prototype,292388900/prototype,Gargaj/prototype,ridixcr/prototype,leafo/prototype,lamsieuquay/prototype,ldf7801528/prototype,fashionsun/prototype,erpframework/prototype,Jiasm/prototype,lamsieuquay/prototype,sstephenson/prototype,baiyanghese/prototype,erpframework/prototype,fashionsun/prototype,Jiasm/prototype,Jiasm/prototype,Gargaj/prototype,sdumitriu/prototype,lamsieuquay/prototype,ShefronYudy/prototype,292388900/prototype,ridixcr/prototype,ShefronYudy/prototype,ldf7801528/prototype,baiyanghese/prototype,erpframework/prototype,ShefronYudy/prototype,ridixcr/prototype,loduis/prototype,sstephenson/prototype,sstephenson/prototype,loduis/prototype