auto merge of #13062 : mbrubeck/rust/doc-edit, r=alexcrichton
auto merge of #13062 : mbrubeck/rust/doc-edit, r=alexcrichton

This is a very minor edit to the tutorial section on references.

Reading this section for the first time, I stumbled on the phrase "a reference can be borrowed to any object."  Its meaning was clear enough once I got it, but I had to re-read it a couple of times to parse it correctly.  Something about the passive voice plus the way "reference to any object" is split up by the verb phrase.  How about this instead?

jashank/rust,graydon/rust,GrahamDennis/rand,zubron/rust,kimroen/rust,philyoon/rust,Ryman/rust,ebfull/rust,graydon/rust,stepancheg/rust-ide-rust,l0kod/rust,krzysz00/rust,emk/rust,mahkoh/rust,cllns/rust,XMPPwocky/rust,bombless/rust-docs-chinese,ejjeong/rust,ktossell/rust,victorvde/rust,kimroen/rust,vhbit/rust,zubron/rust,mdinger/rust,mvdnes/rust,l0kod/rust,mvdnes/rust,jbclements/rust,pshc/rust,pczarn/rust,aneeshusa/rust,avdi/rust,quornian/rust,omasanori/rust,omasanori/rust,bombless/rust,aturon/rust,seanrivera/rust,TheNeikos/rust,servo/rust,pythonesque/rust,XMPPwocky/rust,robertg/rust,victorvde/rust,hauleth/rust,0x73/rust,jashank/rust,0x73/rust,nham/rust,kimroen/rust,P1start/rust,defuz/rust,ruud-v-a/rust,pythonesque/rust,cllns/rust,gifnksm/rust,dwillmer/rust,avdi/rust,vhbit/rust,sae-bom/rust,l0kod/rust,victorvde/rust,pshc/rust,jroesch/rust,nwin/rust,erickt/rust,aturon/rust,emk/rust,zachwick/rust,kimroen/rust,untitaker/rust,graydon/rust,dwillmer/rust,rprichard/rust,bombless/rust,avdi/rust,robertg/rust,0x73/rust,aneeshusa/rust,aturon/rust,ebfull/rust,michaelballantyne/rust-gpu,ktossell/rust,jashank/rust,rohitjoshi/rust,philyoon/rust,untitaker/rust,omasanori/rust,zubron/rust,hauleth/rust,zaeleus/rust,jroesch/rust,krzysz00/rust,emk/rust,jbclements/rust,Ryman/rust,pelmers/rust,vhbit/rust,achanda/rand,dinfuehr/rust,AerialX/rust,mvdnes/rust,ejjeong/rust,robertg/rust,Ryman/rust,P1start/rust,mihneadb/rust,KokaKiwi/rust,miniupnp/rust,richo/rust,TheNeikos/rust,mdinger/rust,andars/rust,aepsil0n/rust,0x73/rust,erickt/rust,pshc/rust,AerialX/rust-rt-minimal,jashank/rust,mahkoh/rust,erickt/rust,ruud-v-a/rust,aidancully/rust,zaeleus/rust,emk/rust,cllns/rust,cllns/rust,KokaKiwi/rust,dwillmer/rust,dwillmer/rust,pelmers/rust,zachwick/rust,seanrivera/rust,mvdnes/rust,stepancheg/rust-ide-rust,KokaKiwi/rust,untitaker/rust,ruud-v-a/rust,dwillmer/rust,reem/rust,robertg/rust,pczarn/rust,quornian/rust,defuz/rust,graydon/rust,pythonesque/rust,AerialX/rust-rt-minimal,sae-bom/rust,nham/rust,philyoon/rust,gifnksm/rust,pczarn/rust,rohitjoshi/rust,aidancully/rust,mihneadb/rust,shepmaster/rand,TheNeikos/rust,untitaker/rust,aneeshusa/rust,jbclements/rust,kwantam/rust,krzysz00/rust,aidancully/rust,servo/rust,GBGamer/rust,pelmers/rust,aturon/rust,AerialX/rust,dwillmer/rust,servo/rust,krzysz00/rust,sae-bom/rust,emk/rust,gifnksm/rust,miniupnp/rust,quornian/rust,erickt/rust,nham/rust,carols10cents/rust,AerialX/rust-rt-minimal,barosl/rust,l0kod/rust,avdi/rust,hauleth/rust,gifnksm/rust,jashank/rust,andars/rust,kwantam/rust,P1start/rust,omasanori/rust,AerialX/rust-rt-minimal,cllns/rust,mvdnes/rust,andars/rust,dwillmer/rust,seanrivera/rust,quornian/rust,rprichard/rust,jbclements/rust,AerialX/rust,michaelballantyne/rust-gpu,ktossell/rust,pczarn/rust,P1start/rust,sae-bom/rust,pczarn/rust,untitaker/rust,mihneadb/rust,reem/rust,miniupnp/rust,jbclements/rust,stepancheg/rust-ide-rust,kwantam/rust,pythonesque/rust,Ryman/rust,bluss/rand,zaeleus/rust,mahkoh/rust,XMPPwocky/rust,mahkoh/rust,reem/rust,mihneadb/rust,mahkoh/rust,nwin/rust,TheNeikos/rust,mahkoh/rust,reem/rust,kwantam/rust,quornian/rust,GBGamer/rust,aturon/rust,huonw/rand,zubron/rust,pczarn/rust,vhbit/rust,ejjeong/rust,0x73/rust,aepsil0n/rust,robertg/rust,zachwick/rust,vhbit/rust,jroesch/rust,l0kod/rust,Ryman/rust,zaeleus/rust,pshc/rust,nwin/rust,aidancully/rust,jbclements/rust,kimroen/rust,mvdnes/rust,jroesch/rust,ejjeong/rust,nwin/rust,erickt/rust,nwin/rust,kwantam/rust,pelmers/rust,aneeshusa/rust,reem/rust,P1start/rust,defuz/rust,zaeleus/rust,ktossell/rust,andars/rust,pythonesque/rust,barosl/rust,zaeleus/rust,miniupnp/rust,pelmers/rust,servo/rust,michaelballantyne/rust-gpu,KokaKiwi/rust,zachwick/rust,AerialX/rust-rt-minimal,richo/rust,stepancheg/rust-ide-rust,GBGamer/rust,carols10cents/rust,zubron/rust,aturon/rust,AerialX/rust,jashank/rust,mdinger/rust,dinfuehr/rust,zubron/rust,GBGamer/rust,pythonesque/rust,pythonesque/rust,stepancheg/rust-ide-rust,carols10cents/rust,ktossell/rust,jbclements/rust,erickt/rust,XMPPwocky/rust,michaelballantyne/rust-gpu,kimroen/rust,rohitjoshi/rust,quornian/rust,0x73/rust,rohitjoshi/rust,l0kod/rust,omasanori/rust,servo/rust,GBGamer/rust,victorvde/rust,nwin/rust,richo/rust,carols10cents/rust,ktossell/rust,gifnksm/rust,seanrivera/rust,erickt/rust,seanrivera/rust,jashank/rust,AerialX/rust,mdinger/rust,GBGamer/rust,bombless/rust,richo/rust,aidancully/rust,michaelballantyne/rust-gpu,philyoon/rust,jroesch/rust,philyoon/rust,zachwick/rust,defuz/rust,aturon/rust,nham/rust,P1start/rust,gifnksm/rust,jroesch/rust,aneeshusa/rust,aepsil0n/rust,rohitjoshi/rust,avdi/rust,ebfull/rust,ruud-v-a/rust,ebfull/rand,ruud-v-a/rust,miniupnp/rust,untitaker/rust,servo/rust,philyoon/rust,miniupnp/rust,krzysz00/rust,nham/rust,ebfull/rust,bombless/rust,victorvde/rust,barosl/rust,ruud-v-a/rust,vhbit/rust,nwin/rust,emk/rust,rprichard/rust,sae-bom/rust,pelmers/rust,rprichard/rust,zubron/rust,michaelballantyne/rust-gpu,defuz/rust,barosl/rust,pshc/rust,miniupnp/rust,dinfuehr/rust,carols10cents/rust,defuz/rust,dinfuehr/rust,aidancully/rust,ejjeong/rust,mdinger/rust,pshc/rust,dwillmer/rust,aepsil0n/rust,graydon/rust,mihneadb/rust,zachwick/rust,0x73/rust,jbclements/rust,servo/rust,andars/rust,stepancheg/rust-ide-rust,XMPPwocky/rust,bombless/rust,jroesch/rust,cllns/rust,avdi/rust,l0kod/rust,ejjeong/rust,Ryman/rust,sae-bom/rust,michaelballantyne/rust-gpu,kimroen/rust,nham/rust,reem/rust,miniupnp/rust,pshc/rust,mdinger/rust,P1start/rust,emk/rust,mihneadb/rust,victorvde/rust,AerialX/rust-rt-minimal,rohitjoshi/rust,barosl/rust,carols10cents/rust,TheNeikos/rust,ebfull/rust,vhbit/rust,retep998/rand,pshc/rust,aepsil0n/rust,KokaKiwi/rust,robertg/rust,seanrivera/rust,dinfuehr/rust,KokaKiwi/rust,rprichard/rust,pczarn/rust,l0kod/rust,GBGamer/rust,zubron/rust,arthurprs/rand,vhbit/rust,hauleth/rust,nham/rust,omasanori/rust,stepancheg/rust-ide-rust,jbclements/rust,hauleth/rust,aepsil0n/rust,dinfuehr/rust,quornian/rust,GBGamer/rust,bhickey/rand,AerialX/rust,aneeshusa/rust,ebfull/rust,nwin/rust,jashank/rust,richo/rust,Ryman/rust,barosl/rust,krzysz00/rust,hauleth/rust,waynenilsen/rand,jroesch/rust,TheNeikos/rust,kwantam/rust,XMPPwocky/rust,barosl/rust,bombless/rust,rprichard/rust,andars/rust,ktossell/rust,graydon/rust,richo/rust