title: Adding a line after an import statement
body: <p>How do I add a line after the following import statement</p>
  
  <pre><code>import { NgModule } from '@angular/core';
  </code></pre>
  
  <p>My code currently doesn't make a change:</p>
  
  <pre><code>sed -i "/\import { NgModule } from '@angular\\/core';\[/ {a\\import { TestModule } from '@angular\\/core';
  }" ./target/src/app/app.module.ts
  </code></pre>