Rollup merge of #27502 - rust-lang:grammer, r=brson
Rollup merge of #27502 - rust-lang:grammer, r=brson

this grammar isn't correct

this should also get backported to beta

/cc @brson 

zubron/rust,graydon/rust,vhbit/rust,aidancully/rust,l0kod/rust,GBGamer/rust,dwillmer/rust,vhbit/rust,jashank/rust,jashank/rust,GBGamer/rust,GBGamer/rust,jashank/rust,l0kod/rust,zubron/rust,zubron/rust,l0kod/rust,graydon/rust,pshc/rust,dwillmer/rust,vhbit/rust,vhbit/rust,jashank/rust,pshc/rust,vhbit/rust,GBGamer/rust,l0kod/rust,GBGamer/rust,zubron/rust,dwillmer/rust,dwillmer/rust,GBGamer/rust,vhbit/rust,vhbit/rust,zubron/rust,graydon/rust,pshc/rust,jashank/rust,jashank/rust,pshc/rust,l0kod/rust,dwillmer/rust,graydon/rust,GBGamer/rust,l0kod/rust,GBGamer/rust,aidancully/rust,pshc/rust,aidancully/rust,dwillmer/rust,aidancully/rust,aidancully/rust,pshc/rust,dwillmer/rust,jashank/rust,graydon/rust,l0kod/rust,l0kod/rust,zubron/rust,zubron/rust,pshc/rust,dwillmer/rust,pshc/rust,aidancully/rust,zubron/rust,vhbit/rust,graydon/rust,jashank/rust