Rollup merge of #23499 - mbrubeck:doc-edit, r=huonw
Rollup merge of #23499 - mbrubeck:doc-edit, r=huonw

 Multiple people have been suprised by this aspect of read_line's behavior, which is not obvious from the docs.

pshc/rust,kwantam/rust,zaeleus/rust,reem/rust,TheNeikos/rust,l0kod/rust,aidancully/rust,omasanori/rust,carols10cents/rust,jashank/rust,TheNeikos/rust,mihneadb/rust,dwillmer/rust,ejjeong/rust,aneeshusa/rust,jashank/rust,philyoon/rust,ruud-v-a/rust,rohitjoshi/rust,ebfull/rust,seanrivera/rust,jroesch/rust,l0kod/rust,KokaKiwi/rust,mahkoh/rust,graydon/rust,zachwick/rust,mvdnes/rust,aidancully/rust,mvdnes/rust,ejjeong/rust,dwillmer/rust,l0kod/rust,zachwick/rust,jroesch/rust,graydon/rust,omasanori/rust,XMPPwocky/rust,miniupnp/rust,pelmers/rust,miniupnp/rust,KokaKiwi/rust,krzysz00/rust,andars/rust,cllns/rust,ejjeong/rust,robertg/rust,ejjeong/rust,mdinger/rust,jroesch/rust,zachwick/rust,jroesch/rust,mahkoh/rust,zubron/rust,graydon/rust,mvdnes/rust,omasanori/rust,krzysz00/rust,mahkoh/rust,pshc/rust,TheNeikos/rust,robertg/rust,aidancully/rust,sae-bom/rust,gifnksm/rust,zubron/rust,andars/rust,zubron/rust,seanrivera/rust,victorvde/rust,cllns/rust,mvdnes/rust,mvdnes/rust,seanrivera/rust,dwillmer/rust,andars/rust,pshc/rust,kwantam/rust,XMPPwocky/rust,philyoon/rust,TheNeikos/rust,robertg/rust,aepsil0n/rust,KokaKiwi/rust,seanrivera/rust,ebfull/rust,sae-bom/rust,ebfull/rust,krzysz00/rust,ruud-v-a/rust,reem/rust,graydon/rust,XMPPwocky/rust,andars/rust,TheNeikos/rust,aepsil0n/rust,dwillmer/rust,GBGamer/rust,pelmers/rust,mdinger/rust,zubron/rust,jashank/rust,avdi/rust,XMPPwocky/rust,zaeleus/rust,carols10cents/rust,carols10cents/rust,mvdnes/rust,vhbit/rust,rohitjoshi/rust,nwin/rust,aepsil0n/rust,mdinger/rust,rohitjoshi/rust,victorvde/rust,zachwick/rust,gifnksm/rust,zubron/rust,ebfull/rust,mdinger/rust,reem/rust,aneeshusa/rust,vhbit/rust,dwillmer/rust,l0kod/rust,jashank/rust,pelmers/rust,andars/rust,vhbit/rust,victorvde/rust,carols10cents/rust,mahkoh/rust,mihneadb/rust,omasanori/rust,XMPPwocky/rust,nwin/rust,vhbit/rust,aneeshusa/rust,ejjeong/rust,dwillmer/rust,zaeleus/rust,pshc/rust,victorvde/rust,sae-bom/rust,cllns/rust,reem/rust,graydon/rust,vhbit/rust,zubron/rust,philyoon/rust,zaeleus/rust,robertg/rust,gifnksm/rust,miniupnp/rust,avdi/rust,vhbit/rust,jashank/rust,aepsil0n/rust,ruud-v-a/rust,TheNeikos/rust,pshc/rust,pelmers/rust,gifnksm/rust,zachwick/rust,nwin/rust,GBGamer/rust,aepsil0n/rust,miniupnp/rust,miniupnp/rust,kwantam/rust,jashank/rust,jroesch/rust,aidancully/rust,nwin/rust,gifnksm/rust,GBGamer/rust,vhbit/rust,mihneadb/rust,avdi/rust,reem/rust,pelmers/rust,miniupnp/rust,cllns/rust,KokaKiwi/rust,l0kod/rust,GBGamer/rust,andars/rust,omasanori/rust,carols10cents/rust,mdinger/rust,sae-bom/rust,pshc/rust,cllns/rust,zaeleus/rust,zubron/rust,pshc/rust,miniupnp/rust,l0kod/rust,nwin/rust,nwin/rust,jroesch/rust,aidancully/rust,mahkoh/rust,victorvde/rust,mihneadb/rust,rohitjoshi/rust,sae-bom/rust,jroesch/rust,ruud-v-a/rust,mdinger/rust,l0kod/rust,aneeshusa/rust,XMPPwocky/rust,nwin/rust,philyoon/rust,seanrivera/rust,philyoon/rust,miniupnp/rust,KokaKiwi/rust,jashank/rust,pelmers/rust,zaeleus/rust,graydon/rust,ebfull/rust,robertg/rust,vhbit/rust,omasanori/rust,aneeshusa/rust,avdi/rust,KokaKiwi/rust,rohitjoshi/rust,ruud-v-a/rust,ruud-v-a/rust,mihneadb/rust,kwantam/rust,reem/rust,sae-bom/rust,seanrivera/rust,zubron/rust,rohitjoshi/rust,GBGamer/rust,aidancully/rust,victorvde/rust,mahkoh/rust,avdi/rust,pshc/rust,jashank/rust,carols10cents/rust,mihneadb/rust,aneeshusa/rust,l0kod/rust,krzysz00/rust,GBGamer/rust,zachwick/rust,dwillmer/rust,krzysz00/rust,gifnksm/rust,ejjeong/rust,avdi/rust,dwillmer/rust,kwantam/rust,GBGamer/rust,philyoon/rust,aepsil0n/rust,ebfull/rust,cllns/rust,krzysz00/rust,jroesch/rust,GBGamer/rust,kwantam/rust,nwin/rust,robertg/rust