Auto merge of #26340 - bluss:bench-sigfix, r=alexcrichton
Auto merge of #26340 - bluss:bench-sigfix, r=alexcrichton

test: Fix a bug in bench result formatting

It would skip the middle part if it was 0, displaying a number a 1000
times too small. The MB/s number next to it gave it away.

Fixed it looks like this:

```
test h ... bench:   1,000,129 ns/iter (+/- 4,730)
```

robertg/rust,nwin/rust,dwillmer/rust,pelmers/rust,aidancully/rust,pelmers/rust,graydon/rust,jashank/rust,l0kod/rust,KokaKiwi/rust,jroesch/rust,mvdnes/rust,jroesch/rust,dwillmer/rust,pshc/rust,pelmers/rust,vhbit/rust,mvdnes/rust,reem/rust,pelmers/rust,pshc/rust,dwillmer/rust,aidancully/rust,mvdnes/rust,KokaKiwi/rust,reem/rust,jroesch/rust,reem/rust,nwin/rust,pshc/rust,zubron/rust,jashank/rust,vhbit/rust,zubron/rust,KokaKiwi/rust,graydon/rust,l0kod/rust,l0kod/rust,jashank/rust,zubron/rust,dwillmer/rust,l0kod/rust,omasanori/rust,vhbit/rust,mvdnes/rust,reem/rust,dwillmer/rust,nwin/rust,GBGamer/rust,graydon/rust,KokaKiwi/rust,GBGamer/rust,pshc/rust,robertg/rust,jroesch/rust,aidancully/rust,graydon/rust,dwillmer/rust,aidancully/rust,zubron/rust,GBGamer/rust,pelmers/rust,nwin/rust,omasanori/rust,jashank/rust,pshc/rust,pshc/rust,mvdnes/rust,jroesch/rust,GBGamer/rust,jroesch/rust,reem/rust,graydon/rust,graydon/rust,nwin/rust,aidancully/rust,GBGamer/rust,omasanori/rust,nwin/rust,robertg/rust,vhbit/rust,vhbit/rust,vhbit/rust,reem/rust,robertg/rust,vhbit/rust,omasanori/rust,dwillmer/rust,GBGamer/rust,vhbit/rust,l0kod/rust,dwillmer/rust,KokaKiwi/rust,jashank/rust,omasanori/rust,aidancully/rust,GBGamer/rust,pshc/rust,l0kod/rust,zubron/rust,zubron/rust,pelmers/rust,robertg/rust,GBGamer/rust,robertg/rust,jashank/rust,nwin/rust,omasanori/rust,jashank/rust,nwin/rust,zubron/rust,jashank/rust,jroesch/rust,l0kod/rust,zubron/rust,pshc/rust,mvdnes/rust,l0kod/rust,KokaKiwi/rust,jroesch/rust