Don't produce newlines in tables

[timtebeek]

Ought to fix the shift seen on

• https://openrewrite.github.io/rewrite-recipe-markdown-generator/reference/recipes/properties/createpropertiesfile.html
• https://docs.openrewrite.org/recipes/properties/createpropertiesfile

[timtebeek]

Looks like <br/> isn't widely supported, and the newlines also break the yaml; better to remove newlines from the example.