title: Not a valid branch name
body: <p>I want to create a branch in git with name [WAP]Testing.
  I tried</p>
  <pre><code>git checkout -b [WAP]Testing
  </code></pre>
  <p>I'm getting below error</p>
  <pre><code>fatal: '[WAP]Test' is not a valid branch name
  </code></pre>
  <p>Then I tried</p>
  <pre><code>git checkout -b '[WAP]Testing' 
  </code></pre>
  <p><a href="https://stackoverflow.com/questions/56612400/not-a-valid-git-branch-name">as in mentioned here</a>.</p>
  <p>But getting same error.</p>