Markdown doesn't work in product short descriptions

[ericelliott]

Summary

The Jetpack markdown feature doesn't work for WooCommerce short product descriptions.

Steps to reproduce

• Activate jetpack and the Markdown extension
• Create a WooCommerce product
• Use Markdown syntax for both the short and long product descriptions
• Save the product

Expected behavior

The Markdown descriptions should be transformed into HTML for display.

Actual behavior

• The short description is not converted.
• The long description is converted.

Screenshot

This forces me to use Markdown HTML in the short descriptions, even though I'm using Markdown for the rest of the site content:

## References

Originally filed in the Jetpack repo: Automattic/jetpack#2396