misc: make block comment a Jade comment
misc: make block comment a Jade comment

(This prevents the text from appearing in the generated HTML as an HTML
comment.)

kwalrath/angular.io,Urigo/angular.io,angular/angular-cn,angular/angular-ko,rsreimer/angular.io,onyoon7/angular-ko,IdeaBlade/angular.io,realappie/angular.io,rsreimer/angular.io,kwalrath/angular.io,chalin/angular.io,Urigo/angular.io,onyoon7/angular-ko,onyoon7/angular-ko,IdeaBlade/angular.io,juleskremer/angular.io,juleskremer/angular.io,angular/angular-cn,kwalrath/angular.io,angular/angular-ko,onyoon7/angular-ko,angular/angular-cn,angular/angular-ko,angular/angular.io,realappie/angular.io,angular/angular-ko,Urigo/angular.io,rsreimer/angular.io,juleskremer/angular.io,chalin/angular.io,juleskremer/angular.io,IdeaBlade/angular.io,juleskremer/angular.io,angular/angular.io,IdeaBlade/angular.io,angular/angular-cn,kwalrath/angular.io,chalin/angular.io,chalin/angular.io,angular/angular.io,chalin/angular.io,realappie/angular.io,angular/angular.io,angular/angular-cn,Urigo/angular.io,kwalrath/angular.io,rsreimer/angular.io,Urigo/angular.io,realappie/angular.io,realappie/angular.io,angular/angular-ko,IdeaBlade/angular.io,rsreimer/angular.io,onyoon7/angular-ko,angular/angular.io