How to put a blank line between two images in doxygen?

@elise_daugherty 

In Doxygen, you can put a blank line between two images by using HTML formatting within the comment block. Here's an example:

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/**
 * image html image1.png
 *
 * <br> <!-- This is the HTML tag for a line break -->
 *
 * image html image2.png
 */

In the above example, the <br> HTML tag is used to create a line break, which will create a blank line between the two images when the Doxygen documentation is generated.

You can use this technique to add a blank line between any two elements in a Doxygen comment block, not just images.