Clear formatting button in comment editor does not clear span codes
VERSION: Calibre 1.13 (64Bit)
When I copy-and-paste in book descriptions from epub documents to the Comment field in the metadata, they usually drag along a lot of unwanted formatting. Using the "Clear Formatting" button usually removes all of it, except in the case of span and div codes. For example, this is what I'm left with (in HTML view) in the case of epubs downloaded from the Archive of Our Own fanfiction site:
I keep having to go in and manually edit the HTML to remove this unwanted formatting.