style($templateRequest): rename minError var to avoid name conflict

Closes #13701

src/ng/templateRequest.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var $compileMinErr = minErr('$compile');
+var $templateRequestMinErr = minErr('$compile');
 
 /**
  * @ngdoc provider
@@ -96,7 +96,7 @@ function $TemplateRequestProvider() {
 
       function handleError(resp) {
         if (!ignoreRequestError) {
-          throw $compileMinErr('tpload', 'Failed to load template: {0} (HTTP status: {1} {2})',
+          throw $templateRequestMinErr('tpload', 'Failed to load template: {0} (HTTP status: {1} {2})',
             tpl, resp.status, resp.statusText);
         }
         return $q.reject(resp);