use $templateRequest instead of $http directly #1777
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In the angular core, $templateRequest is used instead of $http directly for fetching a template.
See ngRoute:
https://github.com/angular/angular.js/blob/master/src/ngRoute/route.js#L595
As well as ngInclude:
https://github.com/angular/angular.js/blob/3ae79c0105cbf58530dfb2d48865f25dcf2d3a2b/src/ng/directive/ngInclude.js#L229
$templateRequest internally calls $http with the $templateCache:
https://github.com/angular/angular.js/blob/f6272333127d908b19da23f9cd8a74052711795b/src/ng/templateRequest.js#L42