sort: add examples for sort.Search
sort: add examples for sort.Search

This adds examples showing the different ways of using sort.Search.

Change-Id: Iaa08b4501691f37908317fdcf2e618fbe9f99ade
Reviewed-on: https://go-review.googlesource.com/29131
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>
Run-TryBot: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

codestation/go,CAFxX/go,Cofyc/go,suncycheng/go,momchil-velikov/go,cloudflare/go,josharian/go,cloudflare/go,polyverse-security/go,derekmarcotte/go,linux-on-ibm-z/go,derekmarcotte/go,Cofyc/go,goodlang/good,goodlang/good,Cofyc/go,vsekhar/elastic-go,nawawi/go,polyverse-security/go,josharian/go,golang/go,vsekhar/elastic-go,suncycheng/go,CAFxX/go,akutz/go,CAFxX/go,josharian/go,derekmarcotte/go,codestation/go,akutz/go,linux-on-ibm-z/go,vsekhar/elastic-go,akutz/go,josharian/go,golang/go,derekmarcotte/go,CAFxX/go,linux-on-ibm-z/go,golang/go,golang/go,suncycheng/go,goodlang/good,akutz/go,nawawi/go,ImJasonH/go,suncycheng/go,Cofyc/go,cloudflare/go,CAFxX/go,codestation/go,suncycheng/go,momchil-velikov/go,goodlang/good,akutz/go,Cofyc/go,CAFxX/go,josharian/go,linux-on-ibm-z/go,vsekhar/elastic-go,codestation/go,cloudflare/go,golang/go,vsekhar/elastic-go,linux-on-ibm-z/go,ImJasonH/go,Cofyc/go,ImJasonH/go,momchil-velikov/go,derekmarcotte/go,nawawi/go,codestation/go,christopher-henderson/Go,golang/go,nawawi/go,josharian/go,momchil-velikov/go,goodlang/good,cloudflare/go,linux-on-ibm-z/go,josharian/go,golang/go,polyverse-security/go,ImJasonH/go,polyverse-security/go,golang/go,cloudflare/go,CAFxX/go,Cofyc/go,ImJasonH/go,suncycheng/go,goodlang/good,polyverse-security/go,momchil-velikov/go,derekmarcotte/go,momchil-velikov/go,akutz/go,suncycheng/go,cloudflare/go,nawawi/go,suncycheng/go,goodlang/good,ImJasonH/go,codestation/go,momchil-velikov/go,linux-on-ibm-z/go,derekmarcotte/go,codestation/go,akutz/go,ImJasonH/go,CAFxX/go,polyverse-security/go,vsekhar/elastic-go,polyverse-security/go,vsekhar/elastic-go,akutz/go,nawawi/go,linux-on-ibm-z/go,Cofyc/go,nawawi/go,cloudflare/go,josharian/go,momchil-velikov/go,vsekhar/elastic-go,goodlang/good,derekmarcotte/go,ImJasonH/go,polyverse-security/go,nawawi/go,codestation/go