fix(@angular-devkit/core): fix an indentation issue with literals

Author: hansl

packages/angular_devkit/core/src/utils/literals.ts

@@ -23,8 +23,7 @@ export function indentBy(indentations: number): TemplateTag {
   }
 
   return (strings, ...values) => {
-    return stripIndent(strings, ...values)
-      .replace(/\n/g, '\n' + i);
+    return i + stripIndent(strings, ...values).replace(/\n/g, '\n' + i);
   };
 }