rustdoc: properly nest markup within enum variant lists (fixes #6605)
rustdoc: properly nest markup within enum variant lists (fixes #6605)

This indents all but the first line of multi-line annotations for
individual enum variants with four spaces so that pandoc will
recognize everything as belonging to the same list item.

Since that introduces `<p>` tags for some list items, I've gone ahead
and inserted blank lines after each list item so that consistently
get `<p>` tags for all `<li>`s documenting variants. It's a bit less
compact now but still tolerable, I think.

servo/rust,untitaker/rust,SiegeLord/rust,pczarn/rust,XMPPwocky/rust,jroesch/rust,jbclements/rust,sae-bom/rust,reem/rust,carols10cents/rust,sarojaba/rust-doc-korean,sae-bom/rust,andars/rust,vhbit/rust,quornian/rust,AerialX/rust,fabricedesre/rust,erickt/rust,0x73/rust,jroesch/rust,pczarn/rust,michaelballantyne/rust-gpu,ktossell/rust,vhbit/rust,gifnksm/rust,kmcallister/rust,arthurprs/rand,pshc/rust,0x73/rust,dinfuehr/rust,pythonesque/rust,dwillmer/rust,kmcallister/rust,victorvde/rust,jashank/rust,aneeshusa/rust,omasanori/rust,zaeleus/rust,jroesch/rust,aidancully/rust,aturon/rust,mdinger/rust,LeoTestard/rust,defuz/rust,dinfuehr/rust,aepsil0n/rust,emk/rust,mahkoh/rust,graydon/rust,gifnksm/rust,pshc/rust,j16r/rust,jbclements/rust,kimroen/rust,P1start/rust,emk/rust,victorvde/rust,pelmers/rust,mahkoh/rust,sarojaba/rust-doc-korean,mdinger/rust,zubron/rust,erickt/rust,pshc/rust,reem/rust,bombless/rust,j16r/rust,SiegeLord/rust,kwantam/rust,aidancully/rust,AerialX/rust-rt-minimal,reem/rust,gifnksm/rust,emk/rust,mahkoh/rust,stepancheg/rust-ide-rust,Ryman/rust,vhbit/rust,michaelballantyne/rust-gpu,P1start/rust,ebfull/rand,rprichard/rust,dwillmer/rust,pythonesque/rust,ktossell/rust,vhbit/rust,LeoTestard/rust,bombless/rust,mdinger/rust,defuz/rust,emk/rust,bombless/rust,aidancully/rust,stepancheg/rust-ide-rust,pshc/rust,zaeleus/rust,bhickey/rand,l0kod/rust,krzysz00/rust,aepsil0n/rust,dwillmer/rust,Ryman/rust,dwillmer/rust,seanrivera/rust,KokaKiwi/rust,bombless/rust,pythonesque/rust,miniupnp/rust,GBGamer/rust,bombless/rust,ebfull/rust,ejjeong/rust,avdi/rust,seanrivera/rust,nwin/rust,nham/rust,michaelballantyne/rust-gpu,avdi/rust,richo/rust,jashank/rust,nham/rust,shepmaster/rand,robertg/rust,mahkoh/rust,defuz/rust,ruud-v-a/rust,zubron/rust,aturon/rust,philyoon/rust,servo/rust,XMPPwocky/rust,richo/rust,mdinger/rust,nwin/rust,pczarn/rust,0x73/rust,nham/rust,aturon/rust,omasanori/rust,mitsuhiko/rust,TheNeikos/rust,achanda/rand,defuz/rust,GBGamer/rust,aepsil0n/rust,miniupnp/rust,krzysz00/rust,miniupnp/rust,mitsuhiko/rust,dinfuehr/rust,aturon/rust,fabricedesre/rust,jbclements/rust,cllns/rust,michaelballantyne/rust-gpu,jroesch/rust,LeoTestard/rust,graydon/rust,ruud-v-a/rust,Ryman/rust,fabricedesre/rust,quornian/rust,AerialX/rust-rt-minimal,dwillmer/rust,kmcallister/rust,untitaker/rust,quornian/rust,mihneadb/rust,jbclements/rust,jbclements/rust,pythonesque/rust,rprichard/rust,seanrivera/rust,mitsuhiko/rust,TheNeikos/rust,kimroen/rust,servo/rust,SiegeLord/rust,mvdnes/rust,aidancully/rust,TheNeikos/rust,j16r/rust,erickt/rust,nwin/rust,l0kod/rust,barosl/rust,omasanori/rust,dinfuehr/rust,jashank/rust,krzysz00/rust,gifnksm/rust,mdinger/rust,hauleth/rust,fabricedesre/rust,graydon/rust,untitaker/rust,kimroen/rust,ktossell/rust,jashank/rust,AerialX/rust,rohitjoshi/rust,pythonesque/rust,zubron/rust,hauleth/rust,ejjeong/rust,ebfull/rust,aturon/rust,victorvde/rust,mdinger/rust,GBGamer/rust,l0kod/rust,andars/rust,servo/rust,philyoon/rust,AerialX/rust,fabricedesre/rust,krzysz00/rust,mitsuhiko/rust,omasanori/rust,jbclements/rust,sarojaba/rust-doc-korean,victorvde/rust,GrahamDennis/rand,kwantam/rust,rohitjoshi/rust,zaeleus/rust,sarojaba/rust-doc-korean,Ryman/rust,zubron/rust,kimroen/rust,nham/rust,mahkoh/rust,sarojaba/rust-doc-korean,LeoTestard/rust,jroesch/rust,philyoon/rust,LeoTestard/rust,KokaKiwi/rust,pshc/rust,cllns/rust,avdi/rust,untitaker/rust,emk/rust,andars/rust,miniupnp/rust,KokaKiwi/rust,kwantam/rust,Ryman/rust,jroesch/rust,pythonesque/rust,jbclements/rust,erickt/rust,seanrivera/rust,mvdnes/rust,KokaKiwi/rust,zachwick/rust,kimroen/rust,barosl/rust,jbclements/rust,mihneadb/rust,pczarn/rust,victorvde/rust,AerialX/rust,ebfull/rust,cllns/rust,mihneadb/rust,krzysz00/rust,untitaker/rust,barosl/rust,SiegeLord/rust,XMPPwocky/rust,Ryman/rust,ktossell/rust,sarojaba/rust-doc-korean,fabricedesre/rust,andars/rust,barosl/rust,jashank/rust,kmcallister/rust,zachwick/rust,vhbit/rust,ebfull/rust,andars/rust,omasanori/rust,j16r/rust,carols10cents/rust,reem/rust,richo/rust,servo/rust,AerialX/rust,l0kod/rust,kimroen/rust,KokaKiwi/rust,zubron/rust,emk/rust,LeoTestard/rust,pczarn/rust,rprichard/rust,ejjeong/rust,bombless/rust,emk/rust,pelmers/rust,P1start/rust,kimroen/rust,zubron/rust,quornian/rust,TheNeikos/rust,gifnksm/rust,ruud-v-a/rust,fabricedesre/rust,ktossell/rust,Ryman/rust,zachwick/rust,ktossell/rust,stepancheg/rust-ide-rust,cllns/rust,pelmers/rust,nwin/rust,zubron/rust,hauleth/rust,zaeleus/rust,michaelballantyne/rust-gpu,0x73/rust,erickt/rust,reem/rust,dwillmer/rust,robertg/rust,quornian/rust,defuz/rust,AerialX/rust-rt-minimal,seanrivera/rust,aneeshusa/rust,carols10cents/rust,0x73/rust,bluss/rand,XMPPwocky/rust,dwillmer/rust,pelmers/rust,ebfull/rust,SiegeLord/rust,nwin/rust,l0kod/rust,ebfull/rust,rprichard/rust,defuz/rust,AerialX/rust,nham/rust,pelmers/rust,gifnksm/rust,hauleth/rust,kwantam/rust,avdi/rust,sae-bom/rust,jroesch/rust,AerialX/rust-rt-minimal,rprichard/rust,pshc/rust,GBGamer/rust,robertg/rust,kwantam/rust,mihneadb/rust,reem/rust,omasanori/rust,nham/rust,aepsil0n/rust,jashank/rust,SiegeLord/rust,dinfuehr/rust,aneeshusa/rust,kmcallister/rust,mvdnes/rust,aturon/rust,philyoon/rust,AerialX/rust-rt-minimal,j16r/rust,ktossell/rust,richo/rust,TheNeikos/rust,stepancheg/rust-ide-rust,GBGamer/rust,pczarn/rust,quornian/rust,jbclements/rust,XMPPwocky/rust,ruud-v-a/rust,P1start/rust,miniupnp/rust,avdi/rust,cllns/rust,kwantam/rust,ejjeong/rust,stepancheg/rust-ide-rust,pelmers/rust,jashank/rust,aepsil0n/rust,servo/rust,barosl/rust,SiegeLord/rust,rprichard/rust,mvdnes/rust,aneeshusa/rust,barosl/rust,sae-bom/rust,jashank/rust,kmcallister/rust,GBGamer/rust,miniupnp/rust,philyoon/rust,XMPPwocky/rust,mitsuhiko/rust,carols10cents/rust,mihneadb/rust,aneeshusa/rust,cllns/rust,pythonesque/rust,nham/rust,erickt/rust,GBGamer/rust,aneeshusa/rust,zachwick/rust,untitaker/rust,ruud-v-a/rust,nwin/rust,retep998/rand,AerialX/rust-rt-minimal,rohitjoshi/rust,aturon/rust,aepsil0n/rust,nwin/rust,michaelballantyne/rust-gpu,LeoTestard/rust,zaeleus/rust,mihneadb/rust,sae-bom/rust,j16r/rust,zachwick/rust,rohitjoshi/rust,l0kod/rust,j16r/rust,bombless/rust-docs-chinese,0x73/rust,ejjeong/rust,robertg/rust,pczarn/rust,dinfuehr/rust,KokaKiwi/rust,barosl/rust,krzysz00/rust,P1start/rust,avdi/rust,seanrivera/rust,nwin/rust,mahkoh/rust,ruud-v-a/rust,mitsuhiko/rust,stepancheg/rust-ide-rust,victorvde/rust,hauleth/rust,michaelballantyne/rust-gpu,jroesch/rust,rohitjoshi/rust,pshc/rust,mitsuhiko/rust,rohitjoshi/rust,GBGamer/rust,mvdnes/rust,hauleth/rust,pshc/rust,graydon/rust,quornian/rust,stepancheg/rust-ide-rust,sarojaba/rust-doc-korean,aidancully/rust,miniupnp/rust,P1start/rust,zubron/rust,graydon/rust,ejjeong/rust,dwillmer/rust,zaeleus/rust,huonw/rand,vhbit/rust,vhbit/rust,P1start/rust,vhbit/rust,l0kod/rust,carols10cents/rust,kmcallister/rust,carols10cents/rust,miniupnp/rust,robertg/rust,graydon/rust,waynenilsen/rand,sae-bom/rust,richo/rust,l0kod/rust,richo/rust,robertg/rust,mvdnes/rust,TheNeikos/rust,0x73/rust,erickt/rust,zachwick/rust,andars/rust,philyoon/rust,aidancully/rust,servo/rust