On completion-engines page, put example first.
On completion-engines page, put example first.

On that page, we have regular expressions (which are not new-user
friendly) and an example (which is new-user friendly).  So the example
should come before the regular expressions.

PickRelated/vimium,csmalin/vimium,philc/vimium,bkudria/vimium,cyrixhero/vimium,dimatter/vimium,elegantwww/vimium,borgified/vimium,elderbas/vimium,Lw-Cui/vimium,douglas-larocca/vimium,PickRelated/vimium,PrestanceDesign/vimium,tuchangwei/vimium,tuchangwei/vimium,hhsue/vimium,bkudria/vimium,mrmr1993/vimium,VPashkov/vimium,decaffeinate-examples/vimium,Robinson10240/vimium,wildeyes/vimium,csmalin/vimium,wildeyes/vimium,willsALMANJ/vimium,Aleroniponi/vimium,Robinson10240/vimium,hhsue/vimium,borgified/vimium,philc/vimium,decaffeinate-examples/vimium,zhangmin510/vimium,poacher2k/vimium,mrmr1993/vimium,borgified/vimium,decaffeinate-examples/vimium,cyrixhero/vimium,dimatter/vimium,poacher2k/vimium,tuchangwei/vimium,PrestanceDesign/vimium,philc/vimium,douglas-larocca/vimium,justalittlenoob/vimium,smblott-github/vimium,smblott-github/vimium,Aleroniponi/vimium,elderbas/vimium,douglas-larocca/vimium,PickRelated/vimium,gdh1995/vimium,elderbas/vimium,cyrixhero/vimium,PrestanceDesign/vimium,zhangmin510/vimium,justalittlenoob/vimium,elegantwww/vimium,zhangmin510/vimium,gdh1995/vimium,smblott-github/vimium,gdh1995/vimium,csmalin/vimium,mrmr1993/vimium,wildeyes/vimium,Robinson10240/vimium,willsALMANJ/vimium,poacher2k/vimium,Lw-Cui/vimium,willsALMANJ/vimium,VPashkov/vimium,VPashkov/vimium,bkudria/vimium,elegantwww/vimium,justalittlenoob/vimium,dimatter/vimium,Aleroniponi/vimium,hhsue/vimium,Lw-Cui/vimium