Rollup merge of #25602 - parkr:patch-1, r=alexcrichton
Rollup merge of #25602 - parkr:patch-1, r=alexcrichton

Padding and alignment are often not implemented by types and can cause confusion in the user.  Per discussion with @alexcrichton, here is my PR.

/cc https://github.com/rust-lang/time/issues/98

sae-bom/rust,pshc/rust,pelmers/rust,dwillmer/rust,mihneadb/rust,aidancully/rust,krzysz00/rust,TheNeikos/rust,seanrivera/rust,aidancully/rust,robertg/rust,kwantam/rust,jroesch/rust,cllns/rust,aidancully/rust,GBGamer/rust,KokaKiwi/rust,carols10cents/rust,jashank/rust,victorvde/rust,KokaKiwi/rust,aepsil0n/rust,aneeshusa/rust,pshc/rust,cllns/rust,aidancully/rust,philyoon/rust,vhbit/rust,sae-bom/rust,seanrivera/rust,nwin/rust,l0kod/rust,aepsil0n/rust,cllns/rust,graydon/rust,kwantam/rust,vhbit/rust,robertg/rust,zubron/rust,reem/rust,sae-bom/rust,GBGamer/rust,ejjeong/rust,reem/rust,philyoon/rust,mvdnes/rust,l0kod/rust,nwin/rust,kwantam/rust,carols10cents/rust,nwin/rust,jroesch/rust,nwin/rust,ejjeong/rust,ejjeong/rust,gifnksm/rust,omasanori/rust,l0kod/rust,reem/rust,aepsil0n/rust,omasanori/rust,KokaKiwi/rust,andars/rust,pshc/rust,seanrivera/rust,nwin/rust,pshc/rust,kwantam/rust,philyoon/rust,victorvde/rust,victorvde/rust,sae-bom/rust,pelmers/rust,mvdnes/rust,aepsil0n/rust,jashank/rust,graydon/rust,robertg/rust,victorvde/rust,ejjeong/rust,zachwick/rust,nwin/rust,andars/rust,graydon/rust,pelmers/rust,gifnksm/rust,omasanori/rust,jashank/rust,krzysz00/rust,GBGamer/rust,seanrivera/rust,carols10cents/rust,victorvde/rust,omasanori/rust,reem/rust,jashank/rust,GBGamer/rust,gifnksm/rust,jroesch/rust,TheNeikos/rust,nwin/rust,mihneadb/rust,l0kod/rust,KokaKiwi/rust,pshc/rust,jroesch/rust,l0kod/rust,TheNeikos/rust,robertg/rust,dwillmer/rust,jroesch/rust,zubron/rust,vhbit/rust,mvdnes/rust,dwillmer/rust,victorvde/rust,mihneadb/rust,XMPPwocky/rust,TheNeikos/rust,vhbit/rust,zubron/rust,cllns/rust,krzysz00/rust,carols10cents/rust,andars/rust,zubron/rust,omasanori/rust,robertg/rust,mihneadb/rust,philyoon/rust,KokaKiwi/rust,kwantam/rust,philyoon/rust,l0kod/rust,andars/rust,XMPPwocky/rust,sae-bom/rust,aneeshusa/rust,XMPPwocky/rust,ejjeong/rust,zubron/rust,jashank/rust,l0kod/rust,GBGamer/rust,zubron/rust,cllns/rust,nwin/rust,vhbit/rust,GBGamer/rust,robertg/rust,GBGamer/rust,carols10cents/rust,KokaKiwi/rust,aepsil0n/rust,seanrivera/rust,ejjeong/rust,carols10cents/rust,zachwick/rust,dwillmer/rust,pshc/rust,aneeshusa/rust,TheNeikos/rust,vhbit/rust,reem/rust,krzysz00/rust,pshc/rust,graydon/rust,mihneadb/rust,dwillmer/rust,jashank/rust,l0kod/rust,XMPPwocky/rust,omasanori/rust,zubron/rust,XMPPwocky/rust,aepsil0n/rust,mihneadb/rust,aneeshusa/rust,krzysz00/rust,zubron/rust,TheNeikos/rust,reem/rust,seanrivera/rust,jashank/rust,graydon/rust,cllns/rust,jashank/rust,dwillmer/rust,vhbit/rust,kwantam/rust,dwillmer/rust,mvdnes/rust,GBGamer/rust,pelmers/rust,gifnksm/rust,gifnksm/rust,krzysz00/rust,sae-bom/rust,philyoon/rust,jroesch/rust,aneeshusa/rust,aneeshusa/rust,mvdnes/rust,pelmers/rust,mvdnes/rust,gifnksm/rust,pelmers/rust,pshc/rust,graydon/rust,zachwick/rust,aidancully/rust,jroesch/rust,jroesch/rust,vhbit/rust,zachwick/rust,dwillmer/rust,andars/rust,zachwick/rust,aidancully/rust,andars/rust,XMPPwocky/rust,zachwick/rust