refactor(@schematics/angular): minor refactorings

Author: gkalpak

packages/schematics/angular/service-worker/index.ts

@@ -75,11 +75,11 @@ function addDependencies(): Rule {
     if (coreDep === null) {
       throw new SchematicsException('Could not find version.');
     }
-    const platformServerDep = {
+    const serviceWorkerDep = {
       ...coreDep,
       name: packageName,
     };
-    addPackageJsonDependency(host, platformServerDep);
+    addPackageJsonDependency(host, serviceWorkerDep);
 
     return host;
   };

packages/schematics/angular/utility/dependencies.ts

@@ -37,7 +37,7 @@ export function addPackageJsonDependency(tree: Tree, dependency: NodeDependency)
     // Haven't found the dependencies key, add it to the root of the package.json.
     appendPropertyInAstObject(recorder, packageJsonAst, dependency.type, {
       [dependency.name]: dependency.version,
-    }, 4);
+    }, 2);
   } else if (depsNode.kind === 'object') {
     // check if package already added
     const depNode = findPropertyInAstObject(depsNode, dependency.name);

packages/schematics/angular/utility/json-utils.ts

@@ -84,7 +84,7 @@ export function insertPropertyInAstObjectInOrder(
 
   recorder.insertRight(
     insertIndex,
-    `${indentStr}`
+    indentStr
     + `"${propertyName}": ${JSON.stringify(value, null, 2).replace(/\n/g, indentStr)}`
     + ',',
   );