Fix docs about `sourceFile`/`directSourceFile`.
Fix docs about `sourceFile`/`directSourceFile`.

babel/babel,hulkish/babel,mysticatea/acorn,samwgoldman/babel,kellyselden/babel,samwgoldman/babel,babel/babel,chicoxyzzy/babel,ternjs/acorn,mathiasbynens/acorn,maurobringolf/babel,sebmck/acorn-jsx,marcominetti/acorn-babel,kaicataldo/babel,hzoo/babel,kaicataldo/babel,claudiopro/babel,hulkish/babel,chicoxyzzy/babel,recipesjs/ingredients,babel/babylon,claudiopro/babel,PolymerLabs/babel,Skillupco/babel,xiemaisi/acorn,gratex/acorn,vadzim/babel,MarcelGerber/acorn,mysticatea/acorn,blai/acorn-jsx,shuhei/babel,kittens/acorn-jsx,Rich-Harris/acorn,mysticatea/acorn,kellyselden/babel,Rich-Harris/acorn,gratex/acorn,RReverser/acorn-jsx,kaicataldo/babel,existentialism/babel,existentialism/babel,shuhei/babel,TimothyGu/acorn,TimothyGu/acorn,ternjs/acorn,kittens/acorn-jsx,PolymerLabs/babel,jridgewell/babel,guybedford/babel,marijnh/acorn,sebmck/acorn-jsx,claudiopro/babel,xiemaisi/acorn,Skillupco/babel,hzoo/babel,jridgewell/babel,kellyselden/babel,ternjs/acorn,hzoo/babel,Skillupco/babel,wcjohnson/babylon-lightscript,ajaxorg/acorn,marcominetti/acorn-babel,jridgewell/babel,existentialism/babel,xiemaisi/acorn,btmills/acorn,thr0w/acorn-jsx,babel/babel,happibum/acorn,MarcelGerber/acorn,maurobringolf/babel,ajaxorg/acorn,danez/babylon,vadzim/babel,hulkish/babel,TimothyGu/acorn,happibum/acorn,babel/babel,mathiasbynens/acorn,kellyselden/babel,Skillupco/babel,hzoo/babel,shuhei/babel,maurobringolf/babel,Rich-Harris/acorn,guybedford/babel,chicoxyzzy/babel,happibum/acorn,hulkish/babel,marijnh/acorn,samwgoldman/babel,guybedford/babel,marijnh/acorn,chicoxyzzy/babel,marcominetti/acorn-babel,cbishopvelti/babylon,btmills/acorn,MarcelGerber/acorn,ajaxorg/acorn,jridgewell/babel,gratex/acorn,PolymerLabs/babel,btmills/acorn,lightscript/babylon-lightscript,kaicataldo/babel,mathiasbynens/acorn