doc: reflect {Num,}Method skips unexported methods
doc: reflect {Num,}Method skips unexported methods

For #15673

Change-Id: I3ce8d4016854d41860c5a9f05a54cda3de49f337
Reviewed-on: https://go-review.googlesource.com/23430
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

cloudflare/go,CAFxX/go,suncycheng/go,codestation/go,akutz/go,nawawi/go,akutz/go,goodlang/good,suncycheng/go,4ad/go,golang/go,golang/go,linux-on-ibm-z/go,nawawi/go,theif519/go,nawawi/go,linux-on-ibm-z/go,codestation/go,nawawi/go,Cofyc/go,ImJasonH/go,goodlang/good,polyverse-security/go,codestation/go,polyverse-security/go,vsekhar/elastic-go,ImJasonH/go,josharian/go,theif519/go,vsekhar/elastic-go,goodlang/good,theif519/go,momchil-velikov/go,4ad/go,CAFxX/go,derekmarcotte/go,Cofyc/go,ImJasonH/go,codestation/go,josharian/go,linux-on-ibm-z/go,theif519/go,polyverse-security/go,momchil-velikov/go,derekmarcotte/go,Cofyc/go,4ad/go,josharian/go,4ad/go,Cofyc/go,codestation/go,golang/go,polyverse-security/go,goodlang/good,CAFxX/go,4ad/go,cloudflare/go,vsekhar/elastic-go,CAFxX/go,nawawi/go,derekmarcotte/go,derekmarcotte/go,vsekhar/elastic-go,cloudflare/go,derekmarcotte/go,momchil-velikov/go,ImJasonH/go,momchil-velikov/go,suncycheng/go,momchil-velikov/go,CAFxX/go,CAFxX/go,polyverse-security/go,theif519/go,suncycheng/go,nawawi/go,josharian/go,golang/go,vsekhar/elastic-go,suncycheng/go,4ad/go,codestation/go,cloudflare/go,linux-on-ibm-z/go,linux-on-ibm-z/go,akutz/go,Cofyc/go,theif519/go,nawawi/go,nawawi/go,josharian/go,vsekhar/elastic-go,suncycheng/go,ImJasonH/go,theif519/go,theif519/go,cloudflare/go,golang/go,cloudflare/go,derekmarcotte/go,Cofyc/go,goodlang/good,linux-on-ibm-z/go,4ad/go,suncycheng/go,cloudflare/go,christopher-henderson/Go,josharian/go,goodlang/good,Cofyc/go,momchil-velikov/go,derekmarcotte/go,ImJasonH/go,akutz/go,ImJasonH/go,codestation/go,cloudflare/go,akutz/go,josharian/go,golang/go,derekmarcotte/go,akutz/go,polyverse-security/go,goodlang/good,linux-on-ibm-z/go,golang/go,polyverse-security/go,ImJasonH/go,momchil-velikov/go,suncycheng/go,vsekhar/elastic-go,akutz/go,momchil-velikov/go,linux-on-ibm-z/go,codestation/go,vsekhar/elastic-go,polyverse-security/go,4ad/go,josharian/go,CAFxX/go,golang/go,CAFxX/go,akutz/go,goodlang/good,Cofyc/go