test-repo/changelog_unreleased/mjml/17338.md

Enabling CSS formatting within <mj-style> tag (#17338 by @iryusa)

<!-- Input -->
<mj-style>
.hello {
  color: blue;
    border: 1px solid blue;
font-size:12px;
} p { font-size: 14px; }
</mj-style>

<!-- Prettier stable -->
<mj-style>
  .hello { color: blue; border: 1px solid blue; font-size:12px; } p { font-size:
  14px; }
</mj-style>

<!-- Prettier main -->
<mj-style>
  .hello {
    color: blue;
    border: 1px solid blue;
    font-size: 12px;
  }
  p {
    font-size: 14px;
  }
</mj-style>