When showing a message with notmuch-show, I'd love to highlight
the file attachment part. I want to distinguish them from the
other mml stuff which I usually do not need to care about. Is
there any easy way to determine that part programmatically?
Looking at the text properties in the show buffer, these parts
seem to be simple buttons with no special property. If notmuch
show would add a text property when inserting these particular
buttons, one could simply add a face overlay or something. Or it
could be wrapped in a special face.
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